diff --git a/lint.ignore b/lint.ignore
index bcbf9e7e1d0e0f..960c1837285bb5 100644
--- a/lint.ignore
+++ b/lint.ignore
@@ -12,7 +12,6 @@ INDENT TABS: encoding/legacy*/*
 
 TRAILING WHITESPACE: html/canvas/tools/current-work-canvas.xhtml
 TRAILING WHITESPACE: conformance-checkers/*
-TRAILING WHITESPACE: webidl/valid/*
 TRAILING WHITESPACE: html/syntax/xmldecl/support/no-version-or-space-or-trailing-question-trailing-body-single-quotes-spaces-and-line-breaks-around-equals.htm
 TRAILING WHITESPACE: html/syntax/xmldecl/support/no-version-or-space-or-trailing-question-trailing-body-single-quotes-spaces-and-line-breaks-around-equals-trail.htm
 
@@ -77,7 +76,6 @@ AHEM COPY: fonts/ahem-extra/AHEM_*.TTF
 ## Test exclusions ##
 
 # Intentional use of CRLF
-CR AT EOL: webidl/valid/idl/documentation-dos.widl
 CR AT EOL: cors/resources/cors-headers.asis
 CR AT EOL: fetch/h1-parsing/resources/blue-with-0x00-in-a-header.asis
 CR AT EOL: html/semantics/forms/the-textarea-element/multiline-placeholder-cr.html
diff --git a/tools/ci/jobs.py b/tools/ci/jobs.py
index 6717b700cd7427..60df561f187125 100644
--- a/tools/ci/jobs.py
+++ b/tools/ci/jobs.py
@@ -36,8 +36,7 @@
                      "css/css-ui/",
                      "html/",
                      "infrastructure/",
-                     "mimesniff/",
-                     "webidl"],
+                     "mimesniff/"],
     "wpt_integration": ["tools/"],
     "wptrunner_infrastructure": ["infrastructure/",
                                  "tools/",
diff --git a/update-built-tests.sh b/update-built-tests.sh
index 0dd00e77cc7d15..7bf3a66fb4baca 100755
--- a/update-built-tests.sh
+++ b/update-built-tests.sh
@@ -8,5 +8,4 @@ infrastructure/assumptions/tools/build.sh
 html/tools/build.sh
 python3 mimesniff/mime-types/resources/generated-mime-types.py
 python3 css/css-ui/tools/appearance-build-webkit-reftests.py
-python3 webidl/tools/generate-setlike.py
 python3 html/syntax/speculative-parsing/tools/generate.py
diff --git a/webidl/README.md b/webidl/README.md
index c6b51584ef2850..136a7649981ea4 100644
--- a/webidl/README.md
+++ b/webidl/README.md
@@ -1,9 +1 @@
 Tests for the [Web IDL Standard](https://webidl.spec.whatwg.org/).
-
-== Syntax tests ==
-
-Syntax tests can be found in the "valid" and "invalid" directories.
-
-These are syntax tests for a Web IDL parser. A correct parser should fail on the tests in the "invalid" directory, and should be able to collect the data necessary to generate the XML serialization for valid fragments collected in the "valid" directory.
-
-(The said XML serialization is the one produced by [widlproc](https://github.com/dontcallmedom/widlproc) from which these tests have been imported.)
diff --git a/webidl/invalid/idl/enum.widl b/webidl/invalid/idl/enum.widl
deleted file mode 100644
index c355c3251c0084..00000000000000
--- a/webidl/invalid/idl/enum.widl
+++ /dev/null
@@ -1 +0,0 @@
-enum foo { 1, 2, 3};
\ No newline at end of file
diff --git a/webidl/invalid/idl/module.widl b/webidl/invalid/idl/module.widl
deleted file mode 100644
index a4c79fdf155ea5..00000000000000
--- a/webidl/invalid/idl/module.widl
+++ /dev/null
@@ -1,25 +0,0 @@
-// Extracted from http://dev.w3.org/2006/webapi/WebIDL/ on 2011-05-06
-module gfx {
-
-  module geom {
-    interface Shape { /* ... */ };
-    interface Rectangle : Shape { /* ... */ };
-    interface Path : Shape { /* ... */ };
-  };
-
-  interface GraphicsContext {
-    void fillShape(geom::Shape s);
-    void strokeShape(geom::Shape s);
-  };
-};
-
-module gui {
-
-  interface Widget { /* ... */  };
-
-  interface Window : Widget {
-    gfx::GraphicsContext getGraphicsContext();
-  };
-
-  interface Button : Widget { /* ... */  };
-};
\ No newline at end of file
diff --git a/webidl/invalid/idl/nonnullableany.widl b/webidl/invalid/idl/nonnullableany.widl
deleted file mode 100644
index 389576555236d9..00000000000000
--- a/webidl/invalid/idl/nonnullableany.widl
+++ /dev/null
@@ -1,3 +0,0 @@
-interface NonNullable {
-  attribute any? foo;
-};
\ No newline at end of file
diff --git a/webidl/invalid/idl/nonnullableobjects.widl b/webidl/invalid/idl/nonnullableobjects.widl
deleted file mode 100644
index 1deac5aeec9081..00000000000000
--- a/webidl/invalid/idl/nonnullableobjects.widl
+++ /dev/null
@@ -1,5 +0,0 @@
-interface Foo {};
-
-interface NonNullable {
-  attribute Foo?? foo;
-};
\ No newline at end of file
diff --git a/webidl/invalid/idl/raises.widl b/webidl/invalid/idl/raises.widl
deleted file mode 100644
index ff65522f2b3355..00000000000000
--- a/webidl/invalid/idl/raises.widl
+++ /dev/null
@@ -1,18 +0,0 @@
-// getraises and setraises are not longer valid Web IDL
-interface Person {
-
-  // An attribute that can raise an exception if it is set to an invalid value.
-  attribute DOMString name setraises (InvalidName);
-
-  // An attribute whose value cannot be assigned to, and which can raise an
-  // exception some circumstances.
-  readonly attribute DOMString petName getraises (NoSuchPet);
-};
-
-exception SomeException {
-};
-
-interface ExceptionThrower {
-  // This attribute always throws a SomeException and never returns a value.
-  attribute long valueOf getraises(SomeException);
-};
\ No newline at end of file
diff --git a/webidl/invalid/idl/scopedname.widl b/webidl/invalid/idl/scopedname.widl
deleted file mode 100644
index cfcb1ccc9395cd..00000000000000
--- a/webidl/invalid/idl/scopedname.widl
+++ /dev/null
@@ -1,2 +0,0 @@
-// scoped names are no longer valid in WebIDL
-  typedef gfx::geom::geom2d::Point Point;
diff --git a/webidl/invalid/idl/sequenceAsAttribute.widl b/webidl/invalid/idl/sequenceAsAttribute.widl
deleted file mode 100644
index c23da82ac22198..00000000000000
--- a/webidl/invalid/idl/sequenceAsAttribute.widl
+++ /dev/null
@@ -1,3 +0,0 @@
-interface sequenceAsAttribute {
-  attribute sequence<short> invalid;
-};
\ No newline at end of file
diff --git a/webidl/invalid/idl/special-omittable.widl b/webidl/invalid/idl/special-omittable.widl
deleted file mode 100644
index bdfbfa709733f9..00000000000000
--- a/webidl/invalid/idl/special-omittable.widl
+++ /dev/null
@@ -1,8 +0,0 @@
-// Extracted from http://dev.w3.org/2006/webapi/WebIDL/ on 2011-05-06
-// omittable is no longer a recognized keywoard as of 20110905
-interface Dictionary {
-  readonly attribute unsigned long propertyCount;
-
-  omittable getter float getProperty(DOMString propertyName);
-  omittable setter void setProperty(DOMString propertyName, float propertyValue);
-};
\ No newline at end of file
diff --git a/webidl/invalid/idl/stringconstants.idl b/webidl/invalid/idl/stringconstants.idl
deleted file mode 100644
index 44fd3ff136ee56..00000000000000
--- a/webidl/invalid/idl/stringconstants.idl
+++ /dev/null
@@ -1,3 +0,0 @@
-interface Util {
-  const DOMString hello = "world";
-};
\ No newline at end of file
diff --git a/webidl/testable_assertions.txt b/webidl/testable_assertions.txt
deleted file mode 100644
index c1706f8c39def7..00000000000000
--- a/webidl/testable_assertions.txt
+++ /dev/null
@@ -1,29 +0,0 @@
-{
-  "travil_test_1": {
-    "title": "The Title of this spec",
-    "specRef": "html > body:nth-child(2) > div:nth-child(1) > h1:nth-child(2)",
-    "notes": "This assertion is linked to the H1 in the beginning of the spec.",
-    "author": "Microsoft",
-    "date": "2012-07-11T23:39:23.634Z",
-    "testURL": "",
-    "testApproved": false
-  },
-  "travil_test_2": {
-    "title": "The Initial publication of WebIDL (at the bottom of the spec)",
-    "specRef": "#changes > dl:nth-child(4) > dt:nth-child(19)",
-    "notes": "17 October 2007 was the FPWD.\nTime to start testing.",
-    "author": "Microsoft",
-    "date": "2012-07-11T23:40:41.624Z",
-    "testURL": "",
-    "testApproved": false
-  },
-  "travil_test_3": {
-    "title": "This assertion should not be found (by design)",
-    "specRef": "#does_not_exist > div",
-    "notes": "This is for testing purposes only (testing the framework)",
-    "author": "Microsoft",
-    "date": "2012-07-11T23:40:41.624Z",
-    "testURL": "",
-    "testApproved": false
-  }
-}
\ No newline at end of file
diff --git a/webidl/tools/generate-setlike.py b/webidl/tools/generate-setlike.py
deleted file mode 100644
index 407a725da6e518..00000000000000
--- a/webidl/tools/generate-setlike.py
+++ /dev/null
@@ -1,113 +0,0 @@
-import os
-
-here = os.path.dirname(__file__)
-
-readonly_template = """\
-interface {interface}A {{
-  readonly setlike<DOMString>;
-  static void {method}();
-}};
-
-interface {interface}B {{
-  readonly setlike<DOMString>;
-  static readonly attribute long {method};
-}};
-"""
-
-readwrite_template = """\
-interface ReadOnly {{
-  readonly setlike<DOMString>;
-}};
-
-interface ReadWrite {{
-  setlike<DOMString>;
-}};
-
-interface {interface}A {{
-  setlike<DOMString>;
-  void {method}();
-}};
-
-interface {interface}B {{
-  readonly setlike<DOMString>;
-  void {method}();
-}};
-
-interface {interface}C {{
-  readonly setlike<DOMString>;
-  readonly attribute long {method};
-}};
-
-interface {interface}D {{
-  readonly setlike<DOMString>;
-  const long {method} = 0;
-}};
-
-interface {interface}E : ReadOnly {{
-  void {method}();
-}};
-
-interface {interface}F : ReadOnly {{
-  readonly attribute long {method};
-}};
-
-interface {interface}G : ReadOnly {{
-  const long {method} = 0;
-}};
-
-interface {interface}H {{
-  readonly setlike<DOMString>;
-  static void {method}();
-}};
-
-interface {interface}I {{
-  readonly setlike<DOMString>;
-  static readonly attribute long {method};
-}};
-
-interface {interface}J1 {{
-  static void {method}();
-}};
-
-interface {interface}J2 : {interface}J1 {{
-  readonly setlike<DOMString>;
-}};
-
-interface {interface}K1 {{
-  static readonly attribute long {method};
-}};
-
-interface {interface}K2 : {interface}K1 {{
-  readonly setlike<DOMString>;
-}};
-"""
-
-members_readonly = [
-    "entries",
-    "forEach",
-    "has",
-    "keys",
-    "size",
-    "values",
-]
-
-members_readwrite = [
-    "add",
-    "clear",
-    "delete",
-]
-
-def transform(m):
-    return m[0].upper() + m[1:]
-
-tests = [
-    (members_readonly, readonly_template),
-    (members_readwrite, readwrite_template),
-]
-
-for (members, template) in tests:
-    for method in members:
-        path = "{here}/../valid/idl/setlike-{method}.widl".format(here=here, method=method)
-        test = template.format(method=method, interface=transform(method))
-        with open(path, "wb") as f:
-            f.write(test.encode("utf8"))
diff --git a/webidl/valid/idl/allowany.widl b/webidl/valid/idl/allowany.widl
deleted file mode 100644
index 2343bb96374f98..00000000000000
--- a/webidl/valid/idl/allowany.widl
+++ /dev/null
@@ -1,6 +0,0 @@
-// Extracted from http://dev.w3.org/2006/webapi/WebIDL/ on 2011-05-06
-interface B {
-  void g();
-  void g(B b);
-  void g([AllowAny] DOMString s);
-};
\ No newline at end of file
diff --git a/webidl/valid/idl/array.widl b/webidl/valid/idl/array.widl
deleted file mode 100644
index 9252069ebefc15..00000000000000
--- a/webidl/valid/idl/array.widl
+++ /dev/null
@@ -1,5 +0,0 @@
-// Extracted from http://dev.w3.org/2006/webapi/WebIDL/ on 2011-05-06
-[Constructor]
-interface LotteryResults {
-  readonly attribute FrozenArray<FrozenArray<unsigned short>> numbers;
-};
diff --git a/webidl/valid/idl/attributes.widl b/webidl/valid/idl/attributes.widl
deleted file mode 100644
index bd1cd2e63c8236..00000000000000
--- a/webidl/valid/idl/attributes.widl
+++ /dev/null
@@ -1,8 +0,0 @@
-// Extracted from http://dev.w3.org/2006/webapi/WebIDL/ on 2011-05-06
-interface Person {
-
-  // A simple attribute that can be set to any value the range an unsigned
-  // short can take.
-  attribute unsigned short age;
-
-};
diff --git a/webidl/valid/idl/callback.widl b/webidl/valid/idl/callback.widl
deleted file mode 100644
index d92f6a18c0a531..00000000000000
--- a/webidl/valid/idl/callback.widl
+++ /dev/null
@@ -1,5 +0,0 @@
-callback AsyncOperationCallback = void (DOMString status);
-
-callback interface EventHandler {
-  void eventOccurred(DOMString details);
-};
\ No newline at end of file
diff --git a/webidl/valid/idl/caller.widl b/webidl/valid/idl/caller.widl
deleted file mode 100644
index 92acb1c017631f..00000000000000
--- a/webidl/valid/idl/caller.widl
+++ /dev/null
@@ -1,5 +0,0 @@
-// Extracted from http://dev.w3.org/2006/webapi/WebIDL/ on 2011-05-06
-interface NumberQuadrupler {
-  // This operation simply returns four times the given number x.
-  legacycaller float compute(float x);
-};
\ No newline at end of file
diff --git a/webidl/valid/idl/constants.widl b/webidl/valid/idl/constants.widl
deleted file mode 100644
index 60e3d2c2450579..00000000000000
--- a/webidl/valid/idl/constants.widl
+++ /dev/null
@@ -1,11 +0,0 @@
-// Extracted from http://dev.w3.org/2006/webapi/WebIDL/ on 2011-05-06
-interface Util {
-  const boolean DEBUG = false;
-  const short negative = -1;
-  const octet LF = 10;
-  const unsigned long BIT_MASK = 0x0000fc00;
-  const float AVOGADRO = 6.022e23;
-  const unrestricted float sobig = Infinity;
-  const unrestricted double minusonedividedbyzero = -Infinity;
-  const short notanumber = NaN;
-};
diff --git a/webidl/valid/idl/constructor.widl b/webidl/valid/idl/constructor.widl
deleted file mode 100644
index f93ec08a6e6f81..00000000000000
--- a/webidl/valid/idl/constructor.widl
+++ /dev/null
@@ -1,9 +0,0 @@
-// Extracted from http://dev.w3.org/2006/webapi/WebIDL/ on 2011-05-06
-[Constructor,
- Constructor(float radius)]
-interface Circle {
-  attribute float r;
-  attribute float cx;
-  attribute float cy;
-  readonly attribute float circumference;
-};
\ No newline at end of file
diff --git a/webidl/valid/idl/dictionary-inherits.widl b/webidl/valid/idl/dictionary-inherits.widl
deleted file mode 100644
index 48f8a0fdceb6c2..00000000000000
--- a/webidl/valid/idl/dictionary-inherits.widl
+++ /dev/null
@@ -1,9 +0,0 @@
-dictionary PaintOptions {
-  DOMString? fillPattern = "black";
-  DOMString? strokePattern = null;
-  Point position;
-};
-
-dictionary WetPaintOptions : PaintOptions {
-  float hydrometry;
-};
\ No newline at end of file
diff --git a/webidl/valid/idl/dictionary.widl b/webidl/valid/idl/dictionary.widl
deleted file mode 100644
index f46b7ba7806afa..00000000000000
--- a/webidl/valid/idl/dictionary.widl
+++ /dev/null
@@ -1,11 +0,0 @@
-// Extracted from Web IDL editors draft May 31 2011
-dictionary PaintOptions {
-  DOMString? fillPattern = "black";
-  DOMString? strokePattern = null;
-  Point position;
-};
-
-partial dictionary A {
-  long h;
-  long d;
-};
\ No newline at end of file
diff --git a/webidl/valid/idl/documentation-dos.widl b/webidl/valid/idl/documentation-dos.widl
deleted file mode 100644
index fb801101f14910..00000000000000
--- a/webidl/valid/idl/documentation-dos.widl
+++ /dev/null
@@ -1,33 +0,0 @@
-/**
-* \brief Testing documentation features
-*
-* This is a
-* single paragraph
-*
-* <p>This is valid.</p>
-* <p>This is <em>valid</em>.</p>
-* <p>This is <b>valid</b>.</p>
-* <p>This is <a href=''>valid</a>.</p>
-* <ul>
-* <li>This</li>
-* <li>is</li>
-* <li>valid</li>
-* </ul>
-* <dl>
-* <dt>This</dt>
-* <dd>valid</dd>
-* </dl>
-* <table>
-* <tr>
-* <td>this</td>
-* <td>is</td>
-* </tr>
-* <tr>
-* <td>valid</td>
-* </tr>
-* </table>
-* <p>This is <br> valid.</p>
-* <p>This is <br /> valid.</p>
-* <p>This is <br/> valid.</p>
-*/
-interface Documentation {};
\ No newline at end of file
diff --git a/webidl/valid/idl/documentation.widl b/webidl/valid/idl/documentation.widl
deleted file mode 100644
index 003e9226f672c2..00000000000000
--- a/webidl/valid/idl/documentation.widl
+++ /dev/null
@@ -1,34 +0,0 @@
-/**
-* \brief Testing documentation features
-*
-* This is a
-* single paragraph
-*
-* <p>This is valid.</p>
-* <p>This is <em>valid</em>.</p>
-* <p>This is <b>valid</b>.</p>
-* <p>This is <a href=''>valid</a>.</p>
-* <ul>
-* <li>This</li>
-* <li>is</li>
-* <li>valid</li>
-* </ul>
-* <dl>
-* <dt>This</dt>
-* <dd>valid</dd>
-* </dl>
-* <table>
-* <tr>
-* <td>this</td>
-* <td>is</td>
-* </tr>
-* <tr>
-* <td>valid</td>
-* </tr>
-* </table>
-* <p>This is <br> valid.</p>
-* <p>This is <br /> valid.</p>
-* <p>This is <br/> valid.</p>
-* <p><img src="foo.png" alt="Valid"/></p>
-*/
-interface Documentation {};
\ No newline at end of file
diff --git a/webidl/valid/idl/enum.widl b/webidl/valid/idl/enum.widl
deleted file mode 100644
index 851fca2e6f6131..00000000000000
--- a/webidl/valid/idl/enum.widl
+++ /dev/null
@@ -1,8 +0,0 @@
-enum MealType { "rice", "noodles", "other" };
-
-interface Meal {
-  attribute MealType type;
-  attribute float size;     // in grams
-
-  void initialize(MealType type, float size);
-};
\ No newline at end of file
diff --git a/webidl/valid/idl/equivalent-decl.widl b/webidl/valid/idl/equivalent-decl.widl
deleted file mode 100644
index 6b3e0eda284ad7..00000000000000
--- a/webidl/valid/idl/equivalent-decl.widl
+++ /dev/null
@@ -1,18 +0,0 @@
-// Extracted from http://dev.w3.org/2006/webapi/WebIDL/ on 2011-05-06
-interface Dictionary {
-  readonly attribute unsigned long propertyCount;
-
-  getter float getProperty(DOMString propertyName);
-  setter void setProperty(DOMString propertyName, float propertyValue);
-};
-
-
-interface Dictionary {
-  readonly attribute unsigned long propertyCount;
-
-  float getProperty(DOMString propertyName);
-  void setProperty(DOMString propertyName, float propertyValue);
-
-  getter float (DOMString propertyName);
-  setter void (DOMString propertyName, float propertyValue);
-};
\ No newline at end of file
diff --git a/webidl/valid/idl/getter-setter.widl b/webidl/valid/idl/getter-setter.widl
deleted file mode 100644
index bdf87e1c7c72f2..00000000000000
--- a/webidl/valid/idl/getter-setter.widl
+++ /dev/null
@@ -1,7 +0,0 @@
-// Extracted from http://dev.w3.org/2006/webapi/WebIDL/ on 2011-05-06
-interface Dictionary {
-  readonly attribute unsigned long propertyCount;
-
-  getter float (DOMString propertyName);
-  setter void (DOMString propertyName, float propertyValue);
-};
\ No newline at end of file
diff --git a/webidl/valid/idl/identifier-qualified-names.widl b/webidl/valid/idl/identifier-qualified-names.widl
deleted file mode 100644
index 0b5642fe2cc94b..00000000000000
--- a/webidl/valid/idl/identifier-qualified-names.widl
+++ /dev/null
@@ -1,44 +0,0 @@
-// Extracted from http://dev.w3.org/2006/webapi/WebIDL/ on 2011-05-06
-  // Typedef identifier: "number"
-  // Qualified name:    "::framework::number"
-  typedef float number;
-
-  // Exception identifier: "FrameworkException"
-  // Qualified name:       "::framework::FrameworkException"
-  interface FrameworkException {
-
-    // Constant identifier: "ERR_NOT_FOUND"
-    // Qualified name:      "::framework::FrameworkException::ERR_NOT_FOUND"
-    const long ERR_NOT_FOUND = 1;
-
-    // Exception field identifier: "code"
-    attribute long code;
-  };
-
-  // Interface identifier: "System"
-  // Qualified name:       "::framework::System"
-  interface System {
-
-    // Operation identifier:          "createObject"
-    // Operation argument identifier: "interface"
-    object createObject(DOMString _interface);
-
-    // Operation has no identifier; it declares a getter.
-    getter DOMString (DOMString keyName);
-  };
-
-    
-    // Interface identifier: "TextField"
-    // Qualified name:       "::framework::gui::TextField"
-    interface TextField {
-
-      // Attribute identifier: "const"
-      attribute boolean _const;
-
-      // Attribute identifier: "value"
-      attribute DOMString? _value;
-    };
-
-interface Foo {
- void op(object interface);
-};
diff --git a/webidl/valid/idl/implements.widl b/webidl/valid/idl/implements.widl
deleted file mode 100644
index 7a310926f1c8d4..00000000000000
--- a/webidl/valid/idl/implements.widl
+++ /dev/null
@@ -1,14 +0,0 @@
-// Extracted from http://dev.w3.org/2006/webapi/WebIDL/ on 2011-05-06
-  interface Node {
-    readonly attribute unsigned short nodeType;
-    // ...
-  };
-
-  interface EventTarget {
-    void addEventListener(DOMString type,
-                          EventListener listener,
-                          boolean useCapture);
-    // ...
-  };
-
-  Node implements EventTarget;
diff --git a/webidl/valid/idl/indexed-properties.widl b/webidl/valid/idl/indexed-properties.widl
deleted file mode 100644
index 4b8aa9e353fac8..00000000000000
--- a/webidl/valid/idl/indexed-properties.widl
+++ /dev/null
@@ -1,12 +0,0 @@
-// Extracted from http://dev.w3.org/2006/webapi/WebIDL/ on 2011-05-06
-interface OrderedMap {
-  readonly attribute unsigned long size;
-
-  getter any getByIndex(unsigned long index);
-  setter void setByIndex(unsigned long index, any value);
-  deleter void removeByIndex(unsigned long index);
-
-  getter any get(DOMString name);
-  setter void set(DOMString name, any value);
-  deleter void remove(DOMString name);
-};
diff --git a/webidl/valid/idl/inherits-getter.widl b/webidl/valid/idl/inherits-getter.widl
deleted file mode 100644
index 558e8116494b2b..00000000000000
--- a/webidl/valid/idl/inherits-getter.widl
+++ /dev/null
@@ -1,16 +0,0 @@
-interface Animal {
-
-  // A simple attribute that can be set to any string value.
-  readonly attribute DOMString name;
-};
-
-interface Person : Animal {
-
-  // An attribute whose value cannot be assigned to.
-  readonly attribute unsigned short age;
-
-  // An attribute that can raise an exception if it is set to an invalid value.
-  // Its getter behavior is inherited from Animal, and need not be specified
-  // the description of Person.
-  inherit attribute DOMString name;
-};
\ No newline at end of file
diff --git a/webidl/valid/idl/interface-inherits.widl b/webidl/valid/idl/interface-inherits.widl
deleted file mode 100644
index 7921def77279f7..00000000000000
--- a/webidl/valid/idl/interface-inherits.widl
+++ /dev/null
@@ -1,12 +0,0 @@
-// Extracted from http://dev.w3.org/2006/webapi/WebIDL/ on 2011-05-06
-interface Animal {
-  attribute DOMString name;
-};
-
-interface Human : Animal {
-  attribute Dog pet;
-};
-
-interface Dog : Animal {
-  attribute Human owner;
-};
\ No newline at end of file
diff --git a/webidl/valid/idl/iterator.widl b/webidl/valid/idl/iterator.widl
deleted file mode 100644
index fe0940b7dd93a2..00000000000000
--- a/webidl/valid/idl/iterator.widl
+++ /dev/null
@@ -1,23 +0,0 @@
-interface SessionManager {
-  Session getSessionForUser(DOMString username);
-  readonly attribute unsigned long sessionCount;
-};
-
-interface Session {
-  readonly attribute DOMString username;
-  // ...
-};
-
-interface SessionManager2 {
-  Session2 getSessionForUser(DOMString username);
-  readonly attribute unsigned long sessionCount;
-};
-
-interface Session2 {
-  readonly attribute DOMString username;
-  // ...
-};
-
-interface SessionIterator {
-  readonly attribute unsigned long remainingSessions;
-};
diff --git a/webidl/valid/idl/namedconstructor.widl b/webidl/valid/idl/namedconstructor.widl
deleted file mode 100644
index c468b78f8e1814..00000000000000
--- a/webidl/valid/idl/namedconstructor.widl
+++ /dev/null
@@ -1,6 +0,0 @@
-// Extracted from http://dev.w3.org/2006/webapi/WebIDL/ on 2011-05-06
-[NamedConstructor=Audio,
- NamedConstructor=Audio(DOMString src)]
-interface HTMLAudioElement : HTMLMediaElement {
-  // ...
-};
\ No newline at end of file
diff --git a/webidl/valid/idl/nointerfaceobject.widl b/webidl/valid/idl/nointerfaceobject.widl
deleted file mode 100644
index c17d75ff8fd373..00000000000000
--- a/webidl/valid/idl/nointerfaceobject.widl
+++ /dev/null
@@ -1,5 +0,0 @@
-// Extracted from http://dev.w3.org/2006/webapi/WebIDL/ on 2011-05-06
-[NoInterfaceObject]
-interface Query {
-  any lookupEntry(unsigned long key);
-};
\ No newline at end of file
diff --git a/webidl/valid/idl/nullable.widl b/webidl/valid/idl/nullable.widl
deleted file mode 100644
index ccbf625ff8aea1..00000000000000
--- a/webidl/valid/idl/nullable.widl
+++ /dev/null
@@ -1,9 +0,0 @@
-// Extracted from http://dev.w3.org/2006/webapi/WebIDL/ on 2011-05-06
-interface MyConstants {
-  const boolean? ARE_WE_THERE_YET = false;
-};
-
-interface Node {
-  readonly attribute DOMString? namespaceURI;
-  // ...
-};
\ No newline at end of file
diff --git a/webidl/valid/idl/nullableobjects.widl b/webidl/valid/idl/nullableobjects.widl
deleted file mode 100644
index 83d1d40b2acfa3..00000000000000
--- a/webidl/valid/idl/nullableobjects.widl
+++ /dev/null
@@ -1,13 +0,0 @@
-// Extracted from WebIDL spec 2011-05-23
-
-interface A {
-  // ...
-};
-interface B {
-  // ...
-};
-interface C {
-  void f(A? x);
-  void f(B? x);
-
-};
\ No newline at end of file
diff --git a/webidl/valid/idl/operation-optional-arg.widl b/webidl/valid/idl/operation-optional-arg.widl
deleted file mode 100644
index 379053b45f14a1..00000000000000
--- a/webidl/valid/idl/operation-optional-arg.widl
+++ /dev/null
@@ -1,4 +0,0 @@
-// Extracted from http://dev.w3.org/2006/webapi/WebIDL/ on 2011-05-06
-interface ColorCreator {
-  object createColor(float v1, float v2, float v3, optional float alpha = 3.5);
-};
\ No newline at end of file
diff --git a/webidl/valid/idl/overloading.widl b/webidl/valid/idl/overloading.widl
deleted file mode 100644
index ef1288a887763d..00000000000000
--- a/webidl/valid/idl/overloading.widl
+++ /dev/null
@@ -1,20 +0,0 @@
-// Extracted from http://dev.w3.org/2006/webapi/WebIDL/ on 2011-05-06
-interface A {
-  // ...
-};
-
-interface B {
-  // ...
-};
-
-interface C {
-  void f(A x);
-  void f(B x);
-};
-
-interface A {
-  /* f1 */ void f(DOMString a);
-  /* f2 */ void f([AllowAny] DOMString a, DOMString b, float... c);
-  /* f3 */ void f();
-  /* f4 */ void f(long a, DOMString b, optional DOMString c, float... d);
-};
\ No newline at end of file
diff --git a/webidl/valid/idl/overridebuiltins.widl b/webidl/valid/idl/overridebuiltins.widl
deleted file mode 100644
index 79211c29e8436d..00000000000000
--- a/webidl/valid/idl/overridebuiltins.widl
+++ /dev/null
@@ -1,6 +0,0 @@
-// Extracted from http://dev.w3.org/2006/webapi/WebIDL/ on 2011-05-06
-[OverrideBuiltins]
-interface StringMap2 {
-  readonly attribute unsigned long length;
-  getter DOMString lookup(DOMString key);
-};
\ No newline at end of file
diff --git a/webidl/valid/idl/partial-interface.widl b/webidl/valid/idl/partial-interface.widl
deleted file mode 100644
index 90e7e0ea421b4f..00000000000000
--- a/webidl/valid/idl/partial-interface.widl
+++ /dev/null
@@ -1,7 +0,0 @@
-interface Foo {
-  attribute DOMString bar;
-};
-
-partial interface Foo {
-  attribute DOMString quux;
-};
\ No newline at end of file
diff --git a/webidl/valid/idl/primitives.widl b/webidl/valid/idl/primitives.widl
deleted file mode 100644
index 92939601a1a839..00000000000000
--- a/webidl/valid/idl/primitives.widl
+++ /dev/null
@@ -1,19 +0,0 @@
-interface Primitives {
-  attribute boolean truth;
-  attribute byte character;
-  attribute octet value;
-  attribute short number;
-  attribute unsigned short positive;
-  attribute long big;
-  attribute unsigned long bigpositive;
-  attribute long long bigbig;
-  attribute  unsigned long long bigbigpositive;
-  attribute float real;
-  attribute double bigreal; 
-  attribute unrestricted float realwithinfinity;
-  attribute unrestricted double bigrealwithinfinity; 
-  attribute DOMString string; 
-  attribute ByteString bytes; 
-  attribute Date date;
-  attribute RegExp regexp;
-};
\ No newline at end of file
diff --git a/webidl/valid/idl/prototyperoot.widl b/webidl/valid/idl/prototyperoot.widl
deleted file mode 100644
index 30dd5cbca13be0..00000000000000
--- a/webidl/valid/idl/prototyperoot.widl
+++ /dev/null
@@ -1,5 +0,0 @@
-// Extracted from http://dev.w3.org/2006/webapi/WebIDL/ on 2011-05-06
-[PrototypeRoot]
-interface Node {
-  readonly attribute unsigned short nodeType;
-};
\ No newline at end of file
diff --git a/webidl/valid/idl/putforwards.widl b/webidl/valid/idl/putforwards.widl
deleted file mode 100644
index 1e50a4ee394f5d..00000000000000
--- a/webidl/valid/idl/putforwards.widl
+++ /dev/null
@@ -1,5 +0,0 @@
-// Extracted from http://dev.w3.org/2006/webapi/WebIDL/ on 2011-05-06
-interface Person {
-  [PutForwards=full] readonly attribute Name name;
-  attribute unsigned short age;
-};
\ No newline at end of file
diff --git a/webidl/valid/idl/reg-operations.widl b/webidl/valid/idl/reg-operations.widl
deleted file mode 100644
index 43b8539edd731f..00000000000000
--- a/webidl/valid/idl/reg-operations.widl
+++ /dev/null
@@ -1,15 +0,0 @@
-// Extracted from http://dev.w3.org/2006/webapi/WebIDL/ on 2011-05-06
-interface Dimensions {
-  attribute unsigned long width;
-  attribute unsigned long height;
-};
-
-interface Button {
-
-  // An operation that takes no arguments, returns a boolean
-  boolean isMouseOver();
-
-  // Overloaded operations.
-  void setDimensions(Dimensions size);
-  void setDimensions(unsigned long width, unsigned long height);
-};
diff --git a/webidl/valid/idl/replaceable.widl b/webidl/valid/idl/replaceable.widl
deleted file mode 100644
index c14d0c37689047..00000000000000
--- a/webidl/valid/idl/replaceable.widl
+++ /dev/null
@@ -1,5 +0,0 @@
-// Extracted from http://dev.w3.org/2006/webapi/WebIDL/ on 2011-05-06
-interface Counter {
-  [Replaceable] readonly attribute unsigned long value;
-  void increment();
-};
\ No newline at end of file
diff --git a/webidl/valid/idl/sequence.widl b/webidl/valid/idl/sequence.widl
deleted file mode 100644
index a1aa931f5f00a1..00000000000000
--- a/webidl/valid/idl/sequence.widl
+++ /dev/null
@@ -1,7 +0,0 @@
-// Extracted from http://dev.w3.org/2006/webapi/WebIDL/ on 2011-05-06
-// edited to remove sequence as attributes, now invalid
-interface Canvas {
-  void drawPolygon(sequence<float> coordinates);
-  sequence<float> getInflectionPoints();
-  // ...
-};
\ No newline at end of file
diff --git a/webidl/valid/idl/serializer.widl b/webidl/valid/idl/serializer.widl
deleted file mode 100644
index 9a27f61f17b4e3..00000000000000
--- a/webidl/valid/idl/serializer.widl
+++ /dev/null
@@ -1,54 +0,0 @@
-interface Transaction {
-  readonly attribute Account from;
-  readonly attribute Account to;
-  readonly attribute float amount;
-  readonly attribute DOMString description;
-  readonly attribute unsigned long number;
-
-  [Default] object toJSON();
-};
-
-interface Account {
-  attribute DOMString name;
-  attribute unsigned long number;
-  DOMString serialize();
-};
-
-interface Transaction2 {
-  readonly attribute Account2 from;
-  readonly attribute Account2 to;
-  readonly attribute float amount;
-  readonly attribute DOMString description;
-  readonly attribute unsigned long number;
-};
-
-interface Account2 {
-  attribute DOMString name;
-  attribute unsigned long number;
-};
-
-interface Account3 {
-  attribute DOMString name;
-  attribute unsigned long number;
-};
-
-interface Account4 {
-  getter object getItem(unsigned long index);
-};
-
-interface Account5 : Account {
-  attribute DOMString secondname;
-};
-
-interface Account6 : Account {
-  attribute DOMString secondname;
-};
-
-interface Account7 {
-  attribute DOMString name;
-  attribute unsigned long number;
-};
-
-interface Account8 {
-  getter object getItem(unsigned long index);
-};
diff --git a/webidl/valid/idl/setlike-add.widl b/webidl/valid/idl/setlike-add.widl
deleted file mode 100644
index a6f84908cee6b2..00000000000000
--- a/webidl/valid/idl/setlike-add.widl
+++ /dev/null
@@ -1,65 +0,0 @@
-interface ReadOnly {
-  readonly setlike<DOMString>;
-};
-
-interface ReadWrite {
-  setlike<DOMString>;
-};
-
-interface AddA {
-  setlike<DOMString>;
-  void add();
-};
-
-interface AddB {
-  readonly setlike<DOMString>;
-  void add();
-};
-
-interface AddC {
-  readonly setlike<DOMString>;
-  readonly attribute long add;
-};
-
-interface AddD {
-  readonly setlike<DOMString>;
-  const long add = 0;
-};
-
-interface AddE : ReadOnly {
-  void add();
-};
-
-interface AddF : ReadOnly {
-  readonly attribute long add;
-};
-
-interface AddG : ReadOnly {
-  const long add = 0;
-};
-
-interface AddH {
-  readonly setlike<DOMString>;
-  static void add();
-};
-
-interface AddI {
-  readonly setlike<DOMString>;
-  static readonly attribute long add;
-};
-
-interface AddJ1 {
-  static void add();
-};
-
-interface AddJ2 : AddJ1 {
-  readonly setlike<DOMString>;
-};
-
-interface AddK1 {
-  static readonly attribute long add;
-};
-
-interface AddK2 : AddK1 {
-  readonly setlike<DOMString>;
-};
diff --git a/webidl/valid/idl/setlike-clear.widl b/webidl/valid/idl/setlike-clear.widl
deleted file mode 100644
index 63ebb50a246465..00000000000000
--- a/webidl/valid/idl/setlike-clear.widl
+++ /dev/null
@@ -1,65 +0,0 @@
-interface ReadOnly {
-  readonly setlike<DOMString>;
-};
-
-interface ReadWrite {
-  setlike<DOMString>;
-};
-
-interface ClearA {
-  setlike<DOMString>;
-  void clear();
-};
-
-interface ClearB {
-  readonly setlike<DOMString>;
-  void clear();
-};
-
-interface ClearC {
-  readonly setlike<DOMString>;
-  readonly attribute long clear;
-};
-
-interface ClearD {
-  readonly setlike<DOMString>;
-  const long clear = 0;
-};
-
-interface ClearE : ReadOnly {
-  void clear();
-};
-
-interface ClearF : ReadOnly {
-  readonly attribute long clear;
-};
-
-interface ClearG : ReadOnly {
-  const long clear = 0;
-};
-
-interface ClearH {
-  readonly setlike<DOMString>;
-  static void clear();
-};
-
-interface ClearI {
-  readonly setlike<DOMString>;
-  static readonly attribute long clear;
-};
-
-interface ClearJ1 {
-  static void clear();
-};
-
-interface ClearJ2 : ClearJ1 {
-  readonly setlike<DOMString>;
-};
-
-interface ClearK1 {
-  static readonly attribute long clear;
-};
-
-interface ClearK2 : ClearK1 {
-  readonly setlike<DOMString>;
-};
diff --git a/webidl/valid/idl/setlike-delete.widl b/webidl/valid/idl/setlike-delete.widl
deleted file mode 100644
index 96d99293aa6979..00000000000000
--- a/webidl/valid/idl/setlike-delete.widl
+++ /dev/null
@@ -1,65 +0,0 @@
-interface ReadOnly {
-  readonly setlike<DOMString>;
-};
-
-interface ReadWrite {
-  setlike<DOMString>;
-};
-
-interface DeleteA {
-  setlike<DOMString>;
-  void delete();
-};
-
-interface DeleteB {
-  readonly setlike<DOMString>;
-  void delete();
-};
-
-interface DeleteC {
-  readonly setlike<DOMString>;
-  readonly attribute long delete;
-};
-
-interface DeleteD {
-  readonly setlike<DOMString>;
-  const long delete = 0;
-};
-
-interface DeleteE : ReadOnly {
-  void delete();
-};
-
-interface DeleteF : ReadOnly {
-  readonly attribute long delete;
-};
-
-interface DeleteG : ReadOnly {
-  const long delete = 0;
-};
-
-interface DeleteH {
-  readonly setlike<DOMString>;
-  static void delete();
-};
-
-interface DeleteI {
-  readonly setlike<DOMString>;
-  static readonly attribute long delete;
-};
-
-interface DeleteJ1 {
-  static void delete();
-};
-
-interface DeleteJ2 : DeleteJ1 {
-  readonly setlike<DOMString>;
-};
-
-interface DeleteK1 {
-  static readonly attribute long delete;
-};
-
-interface DeleteK2 : DeleteK1 {
-  readonly setlike<DOMString>;
-};
diff --git a/webidl/valid/idl/setlike-entries.widl b/webidl/valid/idl/setlike-entries.widl
deleted file mode 100644
index a8b7eed09d4d39..00000000000000
--- a/webidl/valid/idl/setlike-entries.widl
+++ /dev/null
@@ -1,9 +0,0 @@
-interface EntriesA {
-  readonly setlike<DOMString>;
-  static void entries();
-};
-
-interface EntriesB {
-  readonly setlike<DOMString>;
-  static readonly attribute long entries;
-};
diff --git a/webidl/valid/idl/setlike-forEach.widl b/webidl/valid/idl/setlike-forEach.widl
deleted file mode 100644
index f433fbe51377e6..00000000000000
--- a/webidl/valid/idl/setlike-forEach.widl
+++ /dev/null
@@ -1,9 +0,0 @@
-interface ForEachA {
-  readonly setlike<DOMString>;
-  static void forEach();
-};
-
-interface ForEachB {
-  readonly setlike<DOMString>;
-  static readonly attribute long forEach;
-};
diff --git a/webidl/valid/idl/setlike-has.widl b/webidl/valid/idl/setlike-has.widl
deleted file mode 100644
index e50ac56cd19087..00000000000000
--- a/webidl/valid/idl/setlike-has.widl
+++ /dev/null
@@ -1,9 +0,0 @@
-interface HasA {
-  readonly setlike<DOMString>;
-  static void has();
-};
-
-interface HasB {
-  readonly setlike<DOMString>;
-  static readonly attribute long has;
-};
diff --git a/webidl/valid/idl/setlike-keys.widl b/webidl/valid/idl/setlike-keys.widl
deleted file mode 100644
index 9a9899eb528ebc..00000000000000
--- a/webidl/valid/idl/setlike-keys.widl
+++ /dev/null
@@ -1,9 +0,0 @@
-interface KeysA {
-  readonly setlike<DOMString>;
-  static void keys();
-};
-
-interface KeysB {
-  readonly setlike<DOMString>;
-  static readonly attribute long keys;
-};
diff --git a/webidl/valid/idl/setlike-size.widl b/webidl/valid/idl/setlike-size.widl
deleted file mode 100644
index 8a528ccf4b1c0a..00000000000000
--- a/webidl/valid/idl/setlike-size.widl
+++ /dev/null
@@ -1,9 +0,0 @@
-interface SizeA {
-  readonly setlike<DOMString>;
-  static void size();
-};
-
-interface SizeB {
-  readonly setlike<DOMString>;
-  static readonly attribute long size;
-};
diff --git a/webidl/valid/idl/setlike-values.widl b/webidl/valid/idl/setlike-values.widl
deleted file mode 100644
index 34c4c342eb354d..00000000000000
--- a/webidl/valid/idl/setlike-values.widl
+++ /dev/null
@@ -1,9 +0,0 @@
-interface ValuesA {
-  readonly setlike<DOMString>;
-  static void values();
-};
-
-interface ValuesB {
-  readonly setlike<DOMString>;
-  static readonly attribute long values;
-};
diff --git a/webidl/valid/idl/setlike.widl b/webidl/valid/idl/setlike.widl
deleted file mode 100644
index cd5e06347db321..00000000000000
--- a/webidl/valid/idl/setlike.widl
+++ /dev/null
@@ -1,15 +0,0 @@
-interface ReadOnly {
-  readonly setlike<DOMString>;
-};
-
-interface ReadWrite {
-  setlike<DOMString>;
-};
-
-interface ReadOnlyExtAttr {
-  readonly setlike<[Clamp] unsigned short>;
-};
-
-interface ReadWriteExtAttr {
-  setlike<[Clamp] unsigned short>;
-};
diff --git a/webidl/valid/idl/static.widl b/webidl/valid/idl/static.widl
deleted file mode 100644
index 5b2cd36590fd6f..00000000000000
--- a/webidl/valid/idl/static.widl
+++ /dev/null
@@ -1,11 +0,0 @@
-// Extracted from http://dev.w3.org/2006/webapi/WebIDL/ on 2011-05-06
-interface Point { /* ... */ };
-
-interface Circle {
-  attribute float cx;
-  attribute float cy;
-  attribute float radius;
-
-  static readonly attribute long triangulationCount;
-  static Point triangulate(Circle c1, Circle c2, Circle c3);
-};
\ No newline at end of file
diff --git a/webidl/valid/idl/stringifier-attribute.widl b/webidl/valid/idl/stringifier-attribute.widl
deleted file mode 100644
index c964ecb93e601f..00000000000000
--- a/webidl/valid/idl/stringifier-attribute.widl
+++ /dev/null
@@ -1,6 +0,0 @@
-// Extracted from http://dev.w3.org/2006/webapi/WebIDL/ on 2011-05-06
-[Constructor]
-interface Student {
-  attribute unsigned long id;
-  stringifier attribute DOMString name;
-};
\ No newline at end of file
diff --git a/webidl/valid/idl/stringifier-custom.widl b/webidl/valid/idl/stringifier-custom.widl
deleted file mode 100644
index b5d7c87e7f4572..00000000000000
--- a/webidl/valid/idl/stringifier-custom.widl
+++ /dev/null
@@ -1,9 +0,0 @@
-// Extracted from http://dev.w3.org/2006/webapi/WebIDL/ on 2011-05-06
-[Constructor]
-interface Student {
-  attribute unsigned long id;
-  attribute DOMString? familyName;
-  attribute DOMString givenName;
-
-  stringifier DOMString ();
-};
\ No newline at end of file
diff --git a/webidl/valid/idl/stringifier.widl b/webidl/valid/idl/stringifier.widl
deleted file mode 100644
index 4eb483d9b53861..00000000000000
--- a/webidl/valid/idl/stringifier.widl
+++ /dev/null
@@ -1,8 +0,0 @@
-// Extracted from http://dev.w3.org/2006/webapi/WebIDL/ on 2011-05-06
-interface A {
-  stringifier DOMString ();
-};
-
-interface A {
-  stringifier;
-};
\ No newline at end of file
diff --git a/webidl/valid/idl/treatasnull.widl b/webidl/valid/idl/treatasnull.widl
deleted file mode 100644
index d3c55b008c0d86..00000000000000
--- a/webidl/valid/idl/treatasnull.widl
+++ /dev/null
@@ -1,7 +0,0 @@
-// Extracted from http://dev.w3.org/2006/webapi/WebIDL/ on 2011-05-06
-interface Dog {
-  attribute DOMString name;
-  attribute DOMString owner;
-
-  boolean isMemberOfBreed([TreatNullAs=EmptyString] DOMString breedName);
-};
\ No newline at end of file
diff --git a/webidl/valid/idl/treatasundefined.widl b/webidl/valid/idl/treatasundefined.widl
deleted file mode 100644
index e30050f8413403..00000000000000
--- a/webidl/valid/idl/treatasundefined.widl
+++ /dev/null
@@ -1,7 +0,0 @@
-// Extracted from http://dev.w3.org/2006/webapi/WebIDL/ on 2011-05-06
-interface Cat {
-  attribute DOMString name;
-  attribute DOMString owner;
-
-  boolean isMemberOfBreed([TreatUndefinedAs=EmptyString] DOMString breedName);
-};
\ No newline at end of file
diff --git a/webidl/valid/idl/typedef.widl b/webidl/valid/idl/typedef.widl
deleted file mode 100644
index b4c17d8d36a89f..00000000000000
--- a/webidl/valid/idl/typedef.widl
+++ /dev/null
@@ -1,22 +0,0 @@
-// Extracted from http://dev.w3.org/2006/webapi/WebIDL/ on 2011-05-06
-      interface Point {
-        attribute float x;
-        attribute float y;
-      };
-
-      typedef sequence<Point> PointSequence;
-
-      interface Rect {
-        attribute Point topleft;
-        attribute Point bottomright;
-      };
-
-  interface Widget {
-
-    readonly attribute Rect bounds;
-
-    boolean pointWithinBounds(Point p);
-    boolean allPointsWithinBounds(PointSequence ps);
-  };
-
-  typedef [Clamp] octet value;
\ No newline at end of file
diff --git a/webidl/valid/idl/typesuffixes.widl b/webidl/valid/idl/typesuffixes.widl
deleted file mode 100644
index 73ca77176ac03f..00000000000000
--- a/webidl/valid/idl/typesuffixes.widl
+++ /dev/null
@@ -1,3 +0,0 @@
-interface Suffixes {
-  void test(sequence<FrozenArray<DOMString>?>? foo);
-};
diff --git a/webidl/valid/idl/uniontype.widl b/webidl/valid/idl/uniontype.widl
deleted file mode 100644
index 4d99f0196308ae..00000000000000
--- a/webidl/valid/idl/uniontype.widl
+++ /dev/null
@@ -1,3 +0,0 @@
-interface Union {
- attribute (float or (Date or Event) or (Node or DOMString)?) test;
-};
\ No newline at end of file
diff --git a/webidl/valid/idl/variadic-operations.widl b/webidl/valid/idl/variadic-operations.widl
deleted file mode 100644
index 51fae4cc1ea1c4..00000000000000
--- a/webidl/valid/idl/variadic-operations.widl
+++ /dev/null
@@ -1,7 +0,0 @@
-// Extracted from http://dev.w3.org/2006/webapi/WebIDL/ on 2011-05-06
-interface IntegerSet {
-  readonly attribute unsigned long cardinality;
-
-  void union(long... ints);
-  void intersection(long... ints);
-};
\ No newline at end of file
diff --git a/webidl/valid/xml/allowany.widlprocxml b/webidl/valid/xml/allowany.widlprocxml
deleted file mode 100644
index 7da508bcb5c8fa..00000000000000
--- a/webidl/valid/xml/allowany.widlprocxml
+++ /dev/null
@@ -1,44 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>interface B {
-  void g();
-  void g(<ref>B</ref> b);
-  void g([AllowAny] DOMString s);
-};</webidl>
-  <Interface name="B" id="::B">
-    <webidl>interface B {
-  void g();
-  void g(<ref>B</ref> b);
-  void g([AllowAny] DOMString s);
-};</webidl>
-    <Operation name="g" id="::B::g">
-      <webidl>  void g();</webidl>
-      <Type type="void"/>
-      <ArgumentList/>
-    </Operation>
-    <Operation name="g" id="::B::g">
-      <webidl>  void g(<ref>B</ref> b);</webidl>
-      <Type type="void"/>
-      <ArgumentList>
-        <Argument name="b">
-          <Type name="B"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-    <Operation name="g" id="::B::g">
-      <webidl>  void g([AllowAny] DOMString s);</webidl>
-      <Type type="void"/>
-      <ArgumentList>
-        <Argument name="s">
-          <ExtendedAttributeList>
-            <ExtendedAttribute name="AllowAny">
-              <webidl>AllowAny</webidl>
-            </ExtendedAttribute>
-          </ExtendedAttributeList>
-          <Type type="DOMString"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/array.widlprocxml b/webidl/valid/xml/array.widlprocxml
deleted file mode 100644
index 3df72ff160881e..00000000000000
--- a/webidl/valid/xml/array.widlprocxml
+++ /dev/null
@@ -1,27 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>[Constructor]
-interface LotteryResults {
-  readonly attribute unsigned short[][] numbers;
-};</webidl>
-  <Interface name="LotteryResults" id="::LotteryResults">
-    <webidl>[Constructor]
-interface LotteryResults {
-  readonly attribute unsigned short[][] numbers;
-};</webidl>
-    <ExtendedAttributeList>
-      <ExtendedAttribute name="Constructor">
-        <webidl>Constructor</webidl>
-      </ExtendedAttribute>
-    </ExtendedAttributeList>
-    <Attribute readonly="readonly" name="numbers" id="::LotteryResults::numbers">
-      <webidl>  readonly attribute unsigned short[][] numbers;</webidl>
-      <Type type="array">
-        <Type type="array">
-          <Type type="unsigned short"/>
-        </Type>
-      </Type>
-    </Attribute>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/attributes.widlprocxml b/webidl/valid/xml/attributes.widlprocxml
deleted file mode 100644
index 89bd8ac9b019a2..00000000000000
--- a/webidl/valid/xml/attributes.widlprocxml
+++ /dev/null
@@ -1,38 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>exception InvalidName {
-  DOMString reason;
-};
-
-exception NoSuchPet { };
-
-interface Person {
-
-  attribute unsigned short age;
-
-};</webidl>
-  <Exception name="InvalidName" id="::InvalidName">
-    <webidl>exception InvalidName {
-  DOMString reason;
-};</webidl>
-    <ExceptionField name="reason" id="::InvalidName::reason">
-      <webidl>  DOMString reason;</webidl>
-      <Type type="DOMString"/>
-    </ExceptionField>
-  </Exception>
-  <Exception name="NoSuchPet" id="::NoSuchPet">
-    <webidl>exception NoSuchPet { };</webidl>
-  </Exception>
-  <Interface name="Person" id="::Person">
-    <webidl>interface Person {
-
-  attribute unsigned short age;
-
-};</webidl>
-    <Attribute name="age" id="::Person::age">
-      <webidl>  attribute unsigned short age;</webidl>
-      <Type type="unsigned short"/>
-    </Attribute>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/callback.widlprocxml b/webidl/valid/xml/callback.widlprocxml
deleted file mode 100644
index 9eac06ce279d84..00000000000000
--- a/webidl/valid/xml/callback.widlprocxml
+++ /dev/null
@@ -1,32 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>callback AsyncOperationCallback = void (DOMString status);
-
-callback interface EventHandler {
-  void eventOccurred(DOMString details);
-};</webidl>
-  <Callback name="AsyncOperationCallback" id="::AsyncOperationCallback">
-    <webidl>callback AsyncOperationCallback = void (DOMString status);</webidl>
-    <Type type="void"/>
-    <ArgumentList>
-      <Argument name="status">
-        <Type type="DOMString"/>
-      </Argument>
-    </ArgumentList>
-  </Callback>
-  <Interface name="EventHandler" callback="callback" id="::EventHandler">
-    <webidl>callback interface EventHandler {
-  void eventOccurred(DOMString details);
-};</webidl>
-    <Operation name="eventOccurred" id="::EventHandler::eventOccurred">
-      <webidl>  void eventOccurred(DOMString details);</webidl>
-      <Type type="void"/>
-      <ArgumentList>
-        <Argument name="details">
-          <Type type="DOMString"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/caller.widlprocxml b/webidl/valid/xml/caller.widlprocxml
deleted file mode 100644
index 9754d4e0268491..00000000000000
--- a/webidl/valid/xml/caller.widlprocxml
+++ /dev/null
@@ -1,21 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>interface NumberQuadrupler {
-  legacycaller float compute(float x);
-};</webidl>
-  <Interface name="NumberQuadrupler" id="::NumberQuadrupler">
-    <webidl>interface NumberQuadrupler {
-  legacycaller float compute(float x);
-};</webidl>
-    <Operation legacycaller="legacycaller" name="compute" id="::NumberQuadrupler::compute">
-      <webidl>  legacycaller float compute(float x);</webidl>
-      <Type type="float"/>
-      <ArgumentList>
-        <Argument name="x">
-          <Type type="float"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/constants.widlprocxml b/webidl/valid/xml/constants.widlprocxml
deleted file mode 100644
index 51cb4331f754c2..00000000000000
--- a/webidl/valid/xml/constants.widlprocxml
+++ /dev/null
@@ -1,85 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>interface Util {
-  const boolean DEBUG = false;
-  const short negative = -1;
-  const octet LF = 10;
-  const unsigned long BIT_MASK = 0x0000fc00;
-  const float AVOGADRO = 6.022e23;
-  const unrestricted float sobig = Infinity;
-  const unrestricted double minusonedividedbyzero = -Infinity;
-  const short notanumber = NaN;
-};
-
-exception Error {
-  const short ERR_UNKNOWN = 0;
-  const short ERR_OUT_OF_MEMORY = 1;
-
-  short errorCode;
-};</webidl>
-  <Interface name="Util" id="::Util">
-    <webidl>interface Util {
-  const boolean DEBUG = false;
-  const short negative = -1;
-  const octet LF = 10;
-  const unsigned long BIT_MASK = 0x0000fc00;
-  const float AVOGADRO = 6.022e23;
-  const unrestricted float sobig = Infinity;
-  const unrestricted double minusonedividedbyzero = -Infinity;
-  const short notanumber = NaN;
-};</webidl>
-    <Const name="DEBUG" value="false" id="::Util::DEBUG">
-      <webidl>  const boolean DEBUG = false;</webidl>
-      <Type type="boolean"/>
-    </Const>
-    <Const name="negative" value="-1" id="::Util::negative">
-      <webidl>  const short negative = -1;</webidl>
-      <Type type="short"/>
-    </Const>
-    <Const name="LF" value="10" id="::Util::LF">
-      <webidl>  const octet LF = 10;</webidl>
-      <Type type="octet"/>
-    </Const>
-    <Const name="BIT_MASK" value="0x0000fc00" id="::Util::BIT_MASK">
-      <webidl>  const unsigned long BIT_MASK = 0x0000fc00;</webidl>
-      <Type type="unsigned long"/>
-    </Const>
-    <Const name="AVOGADRO" value="6.022e23" id="::Util::AVOGADRO">
-      <webidl>  const float AVOGADRO = 6.022e23;</webidl>
-      <Type type="float"/>
-    </Const>
-    <Const name="sobig" value="Infinity" id="::Util::sobig">
-      <webidl>  const unrestricted float sobig = Infinity;</webidl>
-      <Type type="unrestricted float"/>
-    </Const>
-    <Const name="minusonedividedbyzero" value="-Infinity" id="::Util::minusonedividedbyzero">
-      <webidl>  const unrestricted double minusonedividedbyzero = -Infinity;</webidl>
-      <Type type="unrestricted double"/>
-    </Const>
-    <Const name="notanumber" value="NaN" id="::Util::notanumber">
-      <webidl>  const short notanumber = NaN;</webidl>
-      <Type type="short"/>
-    </Const>
-  </Interface>
-  <Exception name="Error" id="::Error">
-    <webidl>exception Error {
-  const short ERR_UNKNOWN = 0;
-  const short ERR_OUT_OF_MEMORY = 1;
-
-  short errorCode;
-};</webidl>
-    <Const name="ERR_UNKNOWN" value="0" id="::Error::ERR_UNKNOWN">
-      <webidl>  const short ERR_UNKNOWN = 0;</webidl>
-      <Type type="short"/>
-    </Const>
-    <Const name="ERR_OUT_OF_MEMORY" value="1" id="::Error::ERR_OUT_OF_MEMORY">
-      <webidl>  const short ERR_OUT_OF_MEMORY = 1;</webidl>
-      <Type type="short"/>
-    </Const>
-    <ExceptionField name="errorCode" id="::Error::errorCode">
-      <webidl>  short errorCode;</webidl>
-      <Type type="short"/>
-    </ExceptionField>
-  </Exception>
-</Definitions>
diff --git a/webidl/valid/xml/constructor.widlprocxml b/webidl/valid/xml/constructor.widlprocxml
deleted file mode 100644
index 8e78fbab3659f1..00000000000000
--- a/webidl/valid/xml/constructor.widlprocxml
+++ /dev/null
@@ -1,51 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>[Constructor,
- Constructor(float radius)]
-interface Circle {
-  attribute float r;
-  attribute float cx;
-  attribute float cy;
-  readonly attribute float circumference;
-};</webidl>
-  <Interface name="Circle" id="::Circle">
-    <webidl>[Constructor,
- Constructor(float radius)]
-interface Circle {
-  attribute float r;
-  attribute float cx;
-  attribute float cy;
-  readonly attribute float circumference;
-};</webidl>
-    <ExtendedAttributeList>
-      <ExtendedAttribute name="Constructor">
-        <webidl>Constructor</webidl>
-      </ExtendedAttribute>
-      <ExtendedAttribute name="Constructor">
-        <webidl> Constructor(float radius)</webidl>
-        <ArgumentList>
-          <Argument name="radius">
-            <Type type="float"/>
-          </Argument>
-        </ArgumentList>
-      </ExtendedAttribute>
-    </ExtendedAttributeList>
-    <Attribute name="r" id="::Circle::r">
-      <webidl>  attribute float r;</webidl>
-      <Type type="float"/>
-    </Attribute>
-    <Attribute name="cx" id="::Circle::cx">
-      <webidl>  attribute float cx;</webidl>
-      <Type type="float"/>
-    </Attribute>
-    <Attribute name="cy" id="::Circle::cy">
-      <webidl>  attribute float cy;</webidl>
-      <Type type="float"/>
-    </Attribute>
-    <Attribute readonly="readonly" name="circumference" id="::Circle::circumference">
-      <webidl>  readonly attribute float circumference;</webidl>
-      <Type type="float"/>
-    </Attribute>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/dictionary-inherits.widlprocxml b/webidl/valid/xml/dictionary-inherits.widlprocxml
deleted file mode 100644
index 269a83cd849b3a..00000000000000
--- a/webidl/valid/xml/dictionary-inherits.widlprocxml
+++ /dev/null
@@ -1,44 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>dictionary PaintOptions {
-  DOMString? fillPattern = &quot;black&quot;;
-  DOMString? strokePattern = null;
-  <ref>Point</ref> position;
-};
-
-dictionary WetPaintOptions : <ref>PaintOptions</ref> {
-  float hydrometry;
-};</webidl>
-  <Dictionary name="PaintOptions" id="::PaintOptions">
-    <webidl>dictionary PaintOptions {
-  DOMString? fillPattern = &quot;black&quot;;
-  DOMString? strokePattern = null;
-  <ref>Point</ref> position;
-};</webidl>
-    <DictionaryMember name="fillPattern" stringvalue="black" id="::PaintOptions::fillPattern">
-      <webidl>  DOMString? fillPattern = &quot;black&quot;;</webidl>
-      <Type type="DOMString" nullable="nullable"/>
-    </DictionaryMember>
-    <DictionaryMember name="strokePattern" value="null" id="::PaintOptions::strokePattern">
-      <webidl>  DOMString? strokePattern = null;</webidl>
-      <Type type="DOMString" nullable="nullable"/>
-    </DictionaryMember>
-    <DictionaryMember name="position" id="::PaintOptions::position">
-      <webidl>  <ref>Point</ref> position;</webidl>
-      <Type name="Point"/>
-    </DictionaryMember>
-  </Dictionary>
-  <Dictionary name="WetPaintOptions" id="::WetPaintOptions">
-    <webidl>dictionary WetPaintOptions : <ref>PaintOptions</ref> {
-  float hydrometry;
-};</webidl>
-    <DictionaryInheritance>
-      <Name name="PaintOptions"/>
-    </DictionaryInheritance>
-    <DictionaryMember name="hydrometry" id="::WetPaintOptions::hydrometry">
-      <webidl>  float hydrometry;</webidl>
-      <Type type="float"/>
-    </DictionaryMember>
-  </Dictionary>
-</Definitions>
diff --git a/webidl/valid/xml/dictionary.widlprocxml b/webidl/valid/xml/dictionary.widlprocxml
deleted file mode 100644
index 978ccb4e271fa0..00000000000000
--- a/webidl/valid/xml/dictionary.widlprocxml
+++ /dev/null
@@ -1,47 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>dictionary PaintOptions {
-  DOMString? fillPattern = &quot;black&quot;;
-  DOMString? strokePattern = null;
-  <ref>Point</ref> position;
-};
-
-partial dictionary A {
-  long h;
-  long d;
-};</webidl>
-  <Dictionary name="PaintOptions" id="::PaintOptions">
-    <webidl>dictionary PaintOptions {
-  DOMString? fillPattern = &quot;black&quot;;
-  DOMString? strokePattern = null;
-  <ref>Point</ref> position;
-};</webidl>
-    <DictionaryMember name="fillPattern" stringvalue="black" id="::PaintOptions::fillPattern">
-      <webidl>  DOMString? fillPattern = &quot;black&quot;;</webidl>
-      <Type type="DOMString" nullable="nullable"/>
-    </DictionaryMember>
-    <DictionaryMember name="strokePattern" value="null" id="::PaintOptions::strokePattern">
-      <webidl>  DOMString? strokePattern = null;</webidl>
-      <Type type="DOMString" nullable="nullable"/>
-    </DictionaryMember>
-    <DictionaryMember name="position" id="::PaintOptions::position">
-      <webidl>  <ref>Point</ref> position;</webidl>
-      <Type name="Point"/>
-    </DictionaryMember>
-  </Dictionary>
-  <Dictionary name="A" partial="partial" id="::A">
-    <webidl>partial dictionary A {
-  long h;
-  long d;
-};</webidl>
-    <DictionaryMember name="h" id="::A::h">
-      <webidl>  long h;</webidl>
-      <Type type="long"/>
-    </DictionaryMember>
-    <DictionaryMember name="d" id="::A::d">
-      <webidl>  long d;</webidl>
-      <Type type="long"/>
-    </DictionaryMember>
-  </Dictionary>
-</Definitions>
diff --git a/webidl/valid/xml/documentation-dos.widlprocxml b/webidl/valid/xml/documentation-dos.widlprocxml
deleted file mode 100644
index 1611f0e576a038..00000000000000
--- a/webidl/valid/xml/documentation-dos.widlprocxml
+++ /dev/null
@@ -1,59 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>interface Documentation {};</webidl>
-  <Interface name="Documentation" id="::Documentation">
-    <webidl>interface Documentation {};</webidl>
-    <descriptive>
-        <brief>
- Testing documentation features
-        </brief>
-       <description>
-        <p>
-This is a
-single paragraph
-        </p>
-        <p>
-This is valid.        </p>
-        <p>
-This is <em>valid</em>.        </p>
-        <p>
-This is <b>valid</b>.        </p>
-        <p>
-This is <a href=''>valid</a>.        </p>
-        <ul>
-          <li>
-This          </li>
-          <li>
-is          </li>
-          <li>
-valid          </li>
-        </ul>
-        <dl>
-          <dt>
-This          </dt>
-          <dd>
-valid          </dd>
-        </dl>
-        <table>
-          <tr>
-            <td>
-this            </td>
-            <td>
-is            </td>
-          </tr>
-          <tr>
-            <td>
-valid            </td>
-          </tr>
-        </table>
-        <p>
-This is <br/> valid.        </p>
-        <p>
-This is <br /> valid.        </p>
-        <p>
-This is <br/> valid.        </p>
-       </description>
-    </descriptive>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/documentation.widlprocxml b/webidl/valid/xml/documentation.widlprocxml
deleted file mode 100644
index afe4527c221129..00000000000000
--- a/webidl/valid/xml/documentation.widlprocxml
+++ /dev/null
@@ -1,61 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>interface Documentation {};</webidl>
-  <Interface name="Documentation" id="::Documentation">
-    <webidl>interface Documentation {};</webidl>
-    <descriptive>
-        <brief>
- Testing documentation features
-        </brief>
-       <description>
-        <p>
-This is a
-single paragraph
-        </p>
-        <p>
-This is valid.        </p>
-        <p>
-This is <em>valid</em>.        </p>
-        <p>
-This is <b>valid</b>.        </p>
-        <p>
-This is <a href=''>valid</a>.        </p>
-        <ul>
-          <li>
-This          </li>
-          <li>
-is          </li>
-          <li>
-valid          </li>
-        </ul>
-        <dl>
-          <dt>
-This          </dt>
-          <dd>
-valid          </dd>
-        </dl>
-        <table>
-          <tr>
-            <td>
-this            </td>
-            <td>
-is            </td>
-          </tr>
-          <tr>
-            <td>
-valid            </td>
-          </tr>
-        </table>
-        <p>
-This is <br/> valid.        </p>
-        <p>
-This is <br /> valid.        </p>
-        <p>
-This is <br/> valid.        </p>
-        <p>
-<img src="foo.png" alt="Valid"/>        </p>
-       </description>
-    </descriptive>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/enum.widlprocxml b/webidl/valid/xml/enum.widlprocxml
deleted file mode 100644
index e1e8258fbd0616..00000000000000
--- a/webidl/valid/xml/enum.widlprocxml
+++ /dev/null
@@ -1,52 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>enum MealType { &quot;rice&quot;, &quot;noodles&quot;, &quot;other&quot; };
-
-interface Meal {
-  attribute <ref>MealType</ref> type;
-  attribute float size;     
-
-  void initialize(<ref>MealType</ref> type, float size);
-};</webidl>
-  <Enum name="MealType" id="::MealType">
-    <webidl>enum MealType { &quot;rice&quot;, &quot;noodles&quot;, &quot;other&quot; };</webidl>
-    <EnumValue stringvalue="rice">
-      <webidl> &quot;rice</webidl>
-    </EnumValue>
-    <EnumValue stringvalue="noodles">
-      <webidl> &quot;noodles</webidl>
-    </EnumValue>
-    <EnumValue stringvalue="other">
-      <webidl> &quot;other</webidl>
-    </EnumValue>
-  </Enum>
-  <Interface name="Meal" id="::Meal">
-    <webidl>interface Meal {
-  attribute <ref>MealType</ref> type;
-  attribute float size;     
-
-  void initialize(<ref>MealType</ref> type, float size);
-};</webidl>
-    <Attribute name="type" id="::Meal::type">
-      <webidl>  attribute <ref>MealType</ref> type;</webidl>
-      <Type name="MealType"/>
-    </Attribute>
-    <Attribute name="size" id="::Meal::size">
-      <webidl>  attribute float size;</webidl>
-      <Type type="float"/>
-    </Attribute>
-    <Operation name="initialize" id="::Meal::initialize">
-      <webidl>  void initialize(<ref>MealType</ref> type, float size);</webidl>
-      <Type type="void"/>
-      <ArgumentList>
-        <Argument name="type">
-          <Type name="MealType"/>
-        </Argument>
-        <Argument name="size">
-          <Type type="float"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/equivalent-decl.widlprocxml b/webidl/valid/xml/equivalent-decl.widlprocxml
deleted file mode 100644
index c322d0a5e22330..00000000000000
--- a/webidl/valid/xml/equivalent-decl.widlprocxml
+++ /dev/null
@@ -1,111 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>interface Dictionary {
-  readonly attribute unsigned long propertyCount;
-
-  getter float getProperty(DOMString propertyName);
-  setter void setProperty(DOMString propertyName, float propertyValue);
-};
-
-
-interface Dictionary {
-  readonly attribute unsigned long propertyCount;
-
-  float getProperty(DOMString propertyName);
-  void setProperty(DOMString propertyName, float propertyValue);
-
-  getter float (DOMString propertyName);
-  setter void (DOMString propertyName, float propertyValue);
-};</webidl>
-  <Interface name="Dictionary" id="::Dictionary">
-    <webidl>interface Dictionary {
-  readonly attribute unsigned long propertyCount;
-
-  getter float getProperty(DOMString propertyName);
-  setter void setProperty(DOMString propertyName, float propertyValue);
-};</webidl>
-    <Attribute readonly="readonly" name="propertyCount" id="::Dictionary::propertyCount">
-      <webidl>  readonly attribute unsigned long propertyCount;</webidl>
-      <Type type="unsigned long"/>
-    </Attribute>
-    <Operation getter="getter" name="getProperty" id="::Dictionary::getProperty">
-      <webidl>  getter float getProperty(DOMString propertyName);</webidl>
-      <Type type="float"/>
-      <ArgumentList>
-        <Argument name="propertyName">
-          <Type type="DOMString"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-    <Operation setter="setter" name="setProperty" id="::Dictionary::setProperty">
-      <webidl>  setter void setProperty(DOMString propertyName, float propertyValue);</webidl>
-      <Type type="void"/>
-      <ArgumentList>
-        <Argument name="propertyName">
-          <Type type="DOMString"/>
-        </Argument>
-        <Argument name="propertyValue">
-          <Type type="float"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-  </Interface>
-  <Interface name="Dictionary" id="::Dictionary">
-    <webidl>interface Dictionary {
-  readonly attribute unsigned long propertyCount;
-
-  float getProperty(DOMString propertyName);
-  void setProperty(DOMString propertyName, float propertyValue);
-
-  getter float (DOMString propertyName);
-  setter void (DOMString propertyName, float propertyValue);
-};</webidl>
-    <Attribute readonly="readonly" name="propertyCount" id="::Dictionary::propertyCount">
-      <webidl>  readonly attribute unsigned long propertyCount;</webidl>
-      <Type type="unsigned long"/>
-    </Attribute>
-    <Operation name="getProperty" id="::Dictionary::getProperty">
-      <webidl>  float getProperty(DOMString propertyName);</webidl>
-      <Type type="float"/>
-      <ArgumentList>
-        <Argument name="propertyName">
-          <Type type="DOMString"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-    <Operation name="setProperty" id="::Dictionary::setProperty">
-      <webidl>  void setProperty(DOMString propertyName, float propertyValue);</webidl>
-      <Type type="void"/>
-      <ArgumentList>
-        <Argument name="propertyName">
-          <Type type="DOMString"/>
-        </Argument>
-        <Argument name="propertyValue">
-          <Type type="float"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-    <Operation getter="getter">
-      <webidl>  getter float (DOMString propertyName);</webidl>
-      <Type type="float"/>
-      <ArgumentList>
-        <Argument name="propertyName">
-          <Type type="DOMString"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-    <Operation setter="setter">
-      <webidl>  setter void (DOMString propertyName, float propertyValue);</webidl>
-      <Type type="void"/>
-      <ArgumentList>
-        <Argument name="propertyName">
-          <Type type="DOMString"/>
-        </Argument>
-        <Argument name="propertyValue">
-          <Type type="float"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/exception-inheritance.widlprocxml b/webidl/valid/xml/exception-inheritance.widlprocxml
deleted file mode 100644
index 3a1f868a4b4ceb..00000000000000
--- a/webidl/valid/xml/exception-inheritance.widlprocxml
+++ /dev/null
@@ -1,31 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>  exception DOMException {
-    unsigned short code;
-  };
-
-  exception HierarchyRequestError : <ref>DOMException</ref> { };
-  exception NoModificationAllowedError : <ref>DOMException</ref> { };</webidl>
-  <Exception name="DOMException" id="::DOMException">
-    <webidl>  exception DOMException {
-    unsigned short code;
-  };</webidl>
-    <ExceptionField name="code" id="::DOMException::code">
-      <webidl>    unsigned short code;</webidl>
-      <Type type="unsigned short"/>
-    </ExceptionField>
-  </Exception>
-  <Exception name="HierarchyRequestError" id="::HierarchyRequestError">
-    <webidl>  exception HierarchyRequestError : <ref>DOMException</ref> { };</webidl>
-    <ExceptionInheritance>
-      <Name name="DOMException"/>
-    </ExceptionInheritance>
-  </Exception>
-  <Exception name="NoModificationAllowedError" id="::NoModificationAllowedError">
-    <webidl>  exception NoModificationAllowedError : <ref>DOMException</ref> { };</webidl>
-    <ExceptionInheritance>
-      <Name name="DOMException"/>
-    </ExceptionInheritance>
-  </Exception>
-</Definitions>
diff --git a/webidl/valid/xml/exception.widlprocxml b/webidl/valid/xml/exception.widlprocxml
deleted file mode 100644
index ac93320fe16bb3..00000000000000
--- a/webidl/valid/xml/exception.widlprocxml
+++ /dev/null
@@ -1,23 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>interface Dahut {
-  attribute DOMString type;
-};
-
-exception SomeException {
-};</webidl>
-  <Interface name="Dahut" id="::Dahut">
-    <webidl>interface Dahut {
-  attribute DOMString type;
-};</webidl>
-    <Attribute name="type" id="::Dahut::type">
-      <webidl>  attribute DOMString type;</webidl>
-      <Type type="DOMString"/>
-    </Attribute>
-  </Interface>
-  <Exception name="SomeException" id="::SomeException">
-    <webidl>exception SomeException {
-};</webidl>
-  </Exception>
-</Definitions>
diff --git a/webidl/valid/xml/getter-setter.widlprocxml b/webidl/valid/xml/getter-setter.widlprocxml
deleted file mode 100644
index 76afc058c6887c..00000000000000
--- a/webidl/valid/xml/getter-setter.widlprocxml
+++ /dev/null
@@ -1,43 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>interface Dictionary {
-  readonly attribute unsigned long propertyCount;
-
-  getter float (DOMString propertyName);
-  setter void (DOMString propertyName, float propertyValue);
-};</webidl>
-  <Interface name="Dictionary" id="::Dictionary">
-    <webidl>interface Dictionary {
-  readonly attribute unsigned long propertyCount;
-
-  getter float (DOMString propertyName);
-  setter void (DOMString propertyName, float propertyValue);
-};</webidl>
-    <Attribute readonly="readonly" name="propertyCount" id="::Dictionary::propertyCount">
-      <webidl>  readonly attribute unsigned long propertyCount;</webidl>
-      <Type type="unsigned long"/>
-    </Attribute>
-    <Operation getter="getter">
-      <webidl>  getter float (DOMString propertyName);</webidl>
-      <Type type="float"/>
-      <ArgumentList>
-        <Argument name="propertyName">
-          <Type type="DOMString"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-    <Operation setter="setter">
-      <webidl>  setter void (DOMString propertyName, float propertyValue);</webidl>
-      <Type type="void"/>
-      <ArgumentList>
-        <Argument name="propertyName">
-          <Type type="DOMString"/>
-        </Argument>
-        <Argument name="propertyValue">
-          <Type type="float"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/identifier-qualified-names.widlprocxml b/webidl/valid/xml/identifier-qualified-names.widlprocxml
deleted file mode 100644
index b6024e5ff68963..00000000000000
--- a/webidl/valid/xml/identifier-qualified-names.widlprocxml
+++ /dev/null
@@ -1,107 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>  typedef float number;
-
-  exception FrameworkException {
-
-    const long ERR_NOT_FOUND = 1;
-
-    long code;
-  };
-
-  interface System {
-
-    object createObject(DOMString _interface);
-
-    getter DOMString (DOMString keyName);
-  };
-
-    
-    interface TextField {
-
-      attribute boolean _const;
-
-      attribute DOMString? _value;
-    };
-
-interface Foo {
- void op(object interface);
-};</webidl>
-  <Typedef name="number" id="::number">
-    <webidl>  typedef float number;</webidl>
-    <Type type="float"/>
-  </Typedef>
-  <Exception name="FrameworkException" id="::FrameworkException">
-    <webidl>  exception FrameworkException {
-
-    const long ERR_NOT_FOUND = 1;
-
-    long code;
-  };</webidl>
-    <Const name="ERR_NOT_FOUND" value="1" id="::FrameworkException::ERR_NOT_FOUND">
-      <webidl>    const long ERR_NOT_FOUND = 1;</webidl>
-      <Type type="long"/>
-    </Const>
-    <ExceptionField name="code" id="::FrameworkException::code">
-      <webidl>    long code;</webidl>
-      <Type type="long"/>
-    </ExceptionField>
-  </Exception>
-  <Interface name="System" id="::System">
-    <webidl>  interface System {
-
-    object createObject(DOMString _interface);
-
-    getter DOMString (DOMString keyName);
-  };</webidl>
-    <Operation name="createObject" id="::System::createObject">
-      <webidl>    object createObject(DOMString _interface);</webidl>
-      <Type type="object"/>
-      <ArgumentList>
-        <Argument name="_interface">
-          <Type type="DOMString"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-    <Operation getter="getter">
-      <webidl>    getter DOMString (DOMString keyName);</webidl>
-      <Type type="DOMString"/>
-      <ArgumentList>
-        <Argument name="keyName">
-          <Type type="DOMString"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-  </Interface>
-  <Interface name="TextField" id="::TextField">
-    <webidl>    interface TextField {
-
-      attribute boolean _const;
-
-      attribute DOMString? _value;
-    };</webidl>
-    <Attribute name="_const" id="::TextField::_const">
-      <webidl>      attribute boolean _const;</webidl>
-      <Type type="boolean"/>
-    </Attribute>
-    <Attribute name="_value" id="::TextField::_value">
-      <webidl>      attribute DOMString? _value;</webidl>
-      <Type type="DOMString" nullable="nullable"/>
-    </Attribute>
-  </Interface>
-  <Interface name="Foo" id="::Foo">
-    <webidl>interface Foo {
- void op(object interface);
-};</webidl>
-    <Operation name="op" id="::Foo::op">
-      <webidl> void op(object interface);</webidl>
-      <Type type="void"/>
-      <ArgumentList>
-        <Argument name="interface">
-          <Type type="object"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/implements.widlprocxml b/webidl/valid/xml/implements.widlprocxml
deleted file mode 100644
index 3d1c1ab8478fd0..00000000000000
--- a/webidl/valid/xml/implements.widlprocxml
+++ /dev/null
@@ -1,51 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>  interface Node {
-    readonly attribute unsigned short nodeType;
-  };
-
-  interface EventTarget {
-    void addEventListener(DOMString type,
-                          <ref>EventListener</ref> listener,
-                          boolean useCapture);
-  };
-
-  <ref>Node</ref> implements <ref>EventTarget</ref>;</webidl>
-  <Interface name="Node" id="::Node">
-    <webidl>  interface Node {
-    readonly attribute unsigned short nodeType;
-  };</webidl>
-    <Attribute readonly="readonly" name="nodeType" id="::Node::nodeType">
-      <webidl>    readonly attribute unsigned short nodeType;</webidl>
-      <Type type="unsigned short"/>
-    </Attribute>
-  </Interface>
-  <Interface name="EventTarget" id="::EventTarget">
-    <webidl>  interface EventTarget {
-    void addEventListener(DOMString type,
-                          <ref>EventListener</ref> listener,
-                          boolean useCapture);
-  };</webidl>
-    <Operation name="addEventListener" id="::EventTarget::addEventListener">
-      <webidl>    void addEventListener(DOMString type,
-                          <ref>EventListener</ref> listener,
-                          boolean useCapture);</webidl>
-      <Type type="void"/>
-      <ArgumentList>
-        <Argument name="type">
-          <Type type="DOMString"/>
-        </Argument>
-        <Argument name="listener">
-          <Type name="EventListener"/>
-        </Argument>
-        <Argument name="useCapture">
-          <Type type="boolean"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-  </Interface>
-  <Implements name1="Node" name2="EventTarget">
-    <webidl>  <ref>Node</ref> implements <ref>EventTarget</ref>;</webidl>
-  </Implements>
-</Definitions>
diff --git a/webidl/valid/xml/indexed-properties.widlprocxml b/webidl/valid/xml/indexed-properties.widlprocxml
deleted file mode 100644
index fb83621b60d360..00000000000000
--- a/webidl/valid/xml/indexed-properties.widlprocxml
+++ /dev/null
@@ -1,92 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>interface OrderedMap {
-  readonly attribute unsigned long size;
-
-  getter any getByIndex(unsigned long index);
-  setter void setByIndex(unsigned long index, any value);
-  deleter void removeByIndex(unsigned long index);
-
-  getter any get(DOMString name);
-  setter creator void set(DOMString name, any value);
-  deleter void remove(DOMString name);
-};</webidl>
-  <Interface name="OrderedMap" id="::OrderedMap">
-    <webidl>interface OrderedMap {
-  readonly attribute unsigned long size;
-
-  getter any getByIndex(unsigned long index);
-  setter void setByIndex(unsigned long index, any value);
-  deleter void removeByIndex(unsigned long index);
-
-  getter any get(DOMString name);
-  setter creator void set(DOMString name, any value);
-  deleter void remove(DOMString name);
-};</webidl>
-    <Attribute readonly="readonly" name="size" id="::OrderedMap::size">
-      <webidl>  readonly attribute unsigned long size;</webidl>
-      <Type type="unsigned long"/>
-    </Attribute>
-    <Operation getter="getter" name="getByIndex" id="::OrderedMap::getByIndex">
-      <webidl>  getter any getByIndex(unsigned long index);</webidl>
-      <Type type="any"/>
-      <ArgumentList>
-        <Argument name="index">
-          <Type type="unsigned long"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-    <Operation setter="setter" name="setByIndex" id="::OrderedMap::setByIndex">
-      <webidl>  setter void setByIndex(unsigned long index, any value);</webidl>
-      <Type type="void"/>
-      <ArgumentList>
-        <Argument name="index">
-          <Type type="unsigned long"/>
-        </Argument>
-        <Argument name="value">
-          <Type type="any"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-    <Operation deleter="deleter" name="removeByIndex" id="::OrderedMap::removeByIndex">
-      <webidl>  deleter void removeByIndex(unsigned long index);</webidl>
-      <Type type="void"/>
-      <ArgumentList>
-        <Argument name="index">
-          <Type type="unsigned long"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-    <Operation getter="getter" name="get" id="::OrderedMap::get">
-      <webidl>  getter any get(DOMString name);</webidl>
-      <Type type="any"/>
-      <ArgumentList>
-        <Argument name="name">
-          <Type type="DOMString"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-    <Operation setter="setter" creator="creator" name="set" id="::OrderedMap::set">
-      <webidl>  setter creator void set(DOMString name, any value);</webidl>
-      <Type type="void"/>
-      <ArgumentList>
-        <Argument name="name">
-          <Type type="DOMString"/>
-        </Argument>
-        <Argument name="value">
-          <Type type="any"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-    <Operation deleter="deleter" name="remove" id="::OrderedMap::remove">
-      <webidl>  deleter void remove(DOMString name);</webidl>
-      <Type type="void"/>
-      <ArgumentList>
-        <Argument name="name">
-          <Type type="DOMString"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/inherits-getter.widlprocxml b/webidl/valid/xml/inherits-getter.widlprocxml
deleted file mode 100644
index 55e7a317fd98cd..00000000000000
--- a/webidl/valid/xml/inherits-getter.widlprocxml
+++ /dev/null
@@ -1,44 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>interface Animal {
-
-  readonly attribute DOMString name;
-};
-
-interface Person : <ref>Animal</ref> {
-
-  readonly attribute unsigned short age;
-
-  inherit attribute DOMString name;
-};</webidl>
-  <Interface name="Animal" id="::Animal">
-    <webidl>interface Animal {
-
-  readonly attribute DOMString name;
-};</webidl>
-    <Attribute readonly="readonly" name="name" id="::Animal::name">
-      <webidl>  readonly attribute DOMString name;</webidl>
-      <Type type="DOMString"/>
-    </Attribute>
-  </Interface>
-  <Interface name="Person" id="::Person">
-    <webidl>interface Person : <ref>Animal</ref> {
-
-  readonly attribute unsigned short age;
-
-  inherit attribute DOMString name;
-};</webidl>
-    <InterfaceInheritance>
-      <Name name="Animal"/>
-    </InterfaceInheritance>
-    <Attribute readonly="readonly" name="age" id="::Person::age">
-      <webidl>  readonly attribute unsigned short age;</webidl>
-      <Type type="unsigned short"/>
-    </Attribute>
-    <Attribute inherit="inherit" name="name" id="::Person::name">
-      <webidl>  inherit attribute DOMString name;</webidl>
-      <Type type="DOMString"/>
-    </Attribute>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/interface-inherits.widlprocxml b/webidl/valid/xml/interface-inherits.widlprocxml
deleted file mode 100644
index 94f0e29df05eb4..00000000000000
--- a/webidl/valid/xml/interface-inherits.widlprocxml
+++ /dev/null
@@ -1,48 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>interface Animal {
-  attribute DOMString name;
-};
-
-interface Human : <ref>Animal</ref> {
-  attribute <ref>Dog</ref> pet;
-};
-
-interface Dog : <ref>Animal</ref> {
-  attribute <ref>Human</ref> owner;
-};</webidl>
-  <Interface name="Animal" id="::Animal">
-    <webidl>interface Animal {
-  attribute DOMString name;
-};</webidl>
-    <Attribute name="name" id="::Animal::name">
-      <webidl>  attribute DOMString name;</webidl>
-      <Type type="DOMString"/>
-    </Attribute>
-  </Interface>
-  <Interface name="Human" id="::Human">
-    <webidl>interface Human : <ref>Animal</ref> {
-  attribute <ref>Dog</ref> pet;
-};</webidl>
-    <InterfaceInheritance>
-      <Name name="Animal"/>
-    </InterfaceInheritance>
-    <Attribute name="pet" id="::Human::pet">
-      <webidl>  attribute <ref>Dog</ref> pet;</webidl>
-      <Type name="Dog"/>
-    </Attribute>
-  </Interface>
-  <Interface name="Dog" id="::Dog">
-    <webidl>interface Dog : <ref>Animal</ref> {
-  attribute <ref>Human</ref> owner;
-};</webidl>
-    <InterfaceInheritance>
-      <Name name="Animal"/>
-    </InterfaceInheritance>
-    <Attribute name="owner" id="::Dog::owner">
-      <webidl>  attribute <ref>Human</ref> owner;</webidl>
-      <Type name="Human"/>
-    </Attribute>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/iterator.widlprocxml b/webidl/valid/xml/iterator.widlprocxml
deleted file mode 100644
index 8ca95fbbd17f30..00000000000000
--- a/webidl/valid/xml/iterator.widlprocxml
+++ /dev/null
@@ -1,132 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>interface SessionManager {
-  <ref>Session</ref> getSessionForUser(DOMString username);
-  readonly attribute unsigned long sessionCount;
-
-  <ref>Session</ref> iterator;
-};
-
-interface Session {
-  readonly attribute DOMString username;
-};
-
-interface SessionManager2 {
-  <ref>Session2</ref> getSessionForUser(DOMString username);
-  readonly attribute unsigned long sessionCount;
-
-  <ref>Session2</ref> iterator = SessionIterator;
-};
-
-interface Session2 {
-  readonly attribute DOMString username;
-};
-
-interface SessionIterator {
-  readonly attribute unsigned long remainingSessions;
-};
-
-     interface NodeList {
-       <ref>Node</ref> iterator = NodeIterator;
-     };
-
-     interface NodeIterator {
-       <ref>Node</ref> iterator object;
-     };</webidl>
-  <Interface name="SessionManager" id="::SessionManager">
-    <webidl>interface SessionManager {
-  <ref>Session</ref> getSessionForUser(DOMString username);
-  readonly attribute unsigned long sessionCount;
-
-  <ref>Session</ref> iterator;
-};</webidl>
-    <Operation name="getSessionForUser" id="::SessionManager::getSessionForUser">
-      <webidl>  <ref>Session</ref> getSessionForUser(DOMString username);</webidl>
-      <Type name="Session"/>
-      <ArgumentList>
-        <Argument name="username">
-          <Type type="DOMString"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-    <Attribute readonly="readonly" name="sessionCount" id="::SessionManager::sessionCount">
-      <webidl>  readonly attribute unsigned long sessionCount;</webidl>
-      <Type type="unsigned long"/>
-    </Attribute>
-    <Iterator>
-      <webidl>  <ref>Session</ref> iterator;</webidl>
-      <Type name="Session"/>
-    </Iterator>
-  </Interface>
-  <Interface name="Session" id="::Session">
-    <webidl>interface Session {
-  readonly attribute DOMString username;
-};</webidl>
-    <Attribute readonly="readonly" name="username" id="::Session::username">
-      <webidl>  readonly attribute DOMString username;</webidl>
-      <Type type="DOMString"/>
-    </Attribute>
-  </Interface>
-  <Interface name="SessionManager2" id="::SessionManager2">
-    <webidl>interface SessionManager2 {
-  <ref>Session2</ref> getSessionForUser(DOMString username);
-  readonly attribute unsigned long sessionCount;
-
-  <ref>Session2</ref> iterator = SessionIterator;
-};</webidl>
-    <Operation name="getSessionForUser" id="::SessionManager2::getSessionForUser">
-      <webidl>  <ref>Session2</ref> getSessionForUser(DOMString username);</webidl>
-      <Type name="Session2"/>
-      <ArgumentList>
-        <Argument name="username">
-          <Type type="DOMString"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-    <Attribute readonly="readonly" name="sessionCount" id="::SessionManager2::sessionCount">
-      <webidl>  readonly attribute unsigned long sessionCount;</webidl>
-      <Type type="unsigned long"/>
-    </Attribute>
-    <Iterator interface="SessionIterator">
-      <webidl>  <ref>Session2</ref> iterator = SessionIterator;</webidl>
-      <Type name="Session2"/>
-    </Iterator>
-  </Interface>
-  <Interface name="Session2" id="::Session2">
-    <webidl>interface Session2 {
-  readonly attribute DOMString username;
-};</webidl>
-    <Attribute readonly="readonly" name="username" id="::Session2::username">
-      <webidl>  readonly attribute DOMString username;</webidl>
-      <Type type="DOMString"/>
-    </Attribute>
-  </Interface>
-  <Interface name="SessionIterator" id="::SessionIterator">
-    <webidl>interface SessionIterator {
-  readonly attribute unsigned long remainingSessions;
-};</webidl>
-    <Attribute readonly="readonly" name="remainingSessions" id="::SessionIterator::remainingSessions">
-      <webidl>  readonly attribute unsigned long remainingSessions;</webidl>
-      <Type type="unsigned long"/>
-    </Attribute>
-  </Interface>
-  <Interface name="NodeList" id="::NodeList">
-    <webidl>     interface NodeList {
-       <ref>Node</ref> iterator = NodeIterator;
-     };</webidl>
-    <Iterator interface="NodeIterator">
-      <webidl>       <ref>Node</ref> iterator = NodeIterator;</webidl>
-      <Type name="Node"/>
-    </Iterator>
-  </Interface>
-  <Interface name="NodeIterator" id="::NodeIterator">
-    <webidl>     interface NodeIterator {
-       <ref>Node</ref> iterator object;
-     };</webidl>
-    <IteratorObject>
-      <webidl>       <ref>Node</ref> iterator object;</webidl>
-      <Type name="Node"/>
-    </IteratorObject>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/module.widlprocxml b/webidl/valid/xml/module.widlprocxml
deleted file mode 100644
index b575b8705afac0..00000000000000
--- a/webidl/valid/xml/module.widlprocxml
+++ /dev/null
@@ -1,99 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <Module name="gfx" id="::gfx">
-    <webidl>module gfx {
-
-  module geom {
-    interface Shape {  };
-    interface Rectangle : <ref>Shape</ref> {  };
-    interface Path : <ref>Shape</ref> {  };
-  };
-
-  interface GraphicsContext {
-    void fillShape(<ref>geom::Shape</ref> s);
-    void strokeShape(<ref>geom::Shape</ref> s);
-  };
-};</webidl>
-    <Module name="geom" id="::gfx::geom">
-      <webidl>  module geom {
-    interface Shape {  };
-    interface Rectangle : <ref>Shape</ref> {  };
-    interface Path : <ref>Shape</ref> {  };
-  };</webidl>
-      <Interface name="Shape" id="::gfx::geom::Shape">
-        <webidl>    interface Shape {  };</webidl>
-      </Interface>
-      <Interface name="Rectangle" id="::gfx::geom::Rectangle">
-        <webidl>    interface Rectangle : <ref>Shape</ref> {  };</webidl>
-        <InterfaceInheritance>
-          <Name name="Shape"/>
-        </InterfaceInheritance>
-      </Interface>
-      <Interface name="Path" id="::gfx::geom::Path">
-        <webidl>    interface Path : <ref>Shape</ref> {  };</webidl>
-        <InterfaceInheritance>
-          <Name name="Shape"/>
-        </InterfaceInheritance>
-      </Interface>
-    </Module>
-    <Interface name="GraphicsContext" id="::gfx::GraphicsContext">
-      <webidl>  interface GraphicsContext {
-    void fillShape(<ref>geom::Shape</ref> s);
-    void strokeShape(<ref>geom::Shape</ref> s);
-  };</webidl>
-      <Operation name="fillShape" id="::gfx::GraphicsContext::fillShape">
-        <webidl>    void fillShape(<ref>geom::Shape</ref> s);</webidl>
-        <Type type="void"/>
-        <ArgumentList>
-          <Argument name="s">
-            <Type name="geom::Shape"/>
-          </Argument>
-        </ArgumentList>
-      </Operation>
-      <Operation name="strokeShape" id="::gfx::GraphicsContext::strokeShape">
-        <webidl>    void strokeShape(<ref>geom::Shape</ref> s);</webidl>
-        <Type type="void"/>
-        <ArgumentList>
-          <Argument name="s">
-            <Type name="geom::Shape"/>
-          </Argument>
-        </ArgumentList>
-      </Operation>
-    </Interface>
-  </Module>
-  <Module name="gui" id="::gui">
-    <webidl>module gui {
-
-  interface Widget {   };
-
-  interface Window : <ref>Widget</ref> {
-    <ref>gfx::GraphicsContext</ref> getGraphicsContext();
-  };
-
-  interface Button : <ref>Widget</ref> {   };
-};</webidl>
-    <Interface name="Widget" id="::gui::Widget">
-      <webidl>  interface Widget {   };</webidl>
-    </Interface>
-    <Interface name="Window" id="::gui::Window">
-      <webidl>  interface Window : <ref>Widget</ref> {
-    <ref>gfx::GraphicsContext</ref> getGraphicsContext();
-  };</webidl>
-      <InterfaceInheritance>
-        <Name name="Widget"/>
-      </InterfaceInheritance>
-      <Operation name="getGraphicsContext" id="::gui::Window::getGraphicsContext">
-        <webidl>    <ref>gfx::GraphicsContext</ref> getGraphicsContext();</webidl>
-        <Type name="gfx::GraphicsContext"/>
-        <ArgumentList/>
-      </Operation>
-    </Interface>
-    <Interface name="Button" id="::gui::Button">
-      <webidl>  interface Button : <ref>Widget</ref> {   };</webidl>
-      <InterfaceInheritance>
-        <Name name="Widget"/>
-      </InterfaceInheritance>
-    </Interface>
-  </Module>
-</Definitions>
diff --git a/webidl/valid/xml/namedconstructor.widlprocxml b/webidl/valid/xml/namedconstructor.widlprocxml
deleted file mode 100644
index 9f6616128798ce..00000000000000
--- a/webidl/valid/xml/namedconstructor.widlprocxml
+++ /dev/null
@@ -1,30 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>[NamedConstructor=Audio,
- NamedConstructor=Audio(DOMString src)]
-interface HTMLAudioElement : <ref>HTMLMediaElement</ref> {
-};</webidl>
-  <Interface name="HTMLAudioElement" id="::HTMLAudioElement">
-    <webidl>[NamedConstructor=Audio,
- NamedConstructor=Audio(DOMString src)]
-interface HTMLAudioElement : <ref>HTMLMediaElement</ref> {
-};</webidl>
-    <ExtendedAttributeList>
-      <ExtendedAttribute name="NamedConstructor" value="Audio">
-        <webidl>NamedConstructor</webidl>
-      </ExtendedAttribute>
-      <ExtendedAttribute name="NamedConstructor" value="Audio">
-        <webidl> NamedConstructor=Audio(DOMString src)</webidl>
-        <ArgumentList>
-          <Argument name="src">
-            <Type type="DOMString"/>
-          </Argument>
-        </ArgumentList>
-      </ExtendedAttribute>
-    </ExtendedAttributeList>
-    <InterfaceInheritance>
-      <Name name="HTMLMediaElement"/>
-    </InterfaceInheritance>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/namespaceobject.widlprocxml b/webidl/valid/xml/namespaceobject.widlprocxml
deleted file mode 100644
index af0cde93719964..00000000000000
--- a/webidl/valid/xml/namespaceobject.widlprocxml
+++ /dev/null
@@ -1,60 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <Module name="acme" id="::acme">
-    <webidl>[NamespaceObject]
-module acme {
-  
-  exception DeviceException { };
-
-  module pim {
-
-    [Constructor]
-    interface Contact { };
-
-    [Constructor,
-     NamedConstructor=RecurringEvent(long freq)]
-    interface CalendarEvent { };
-  };
-};</webidl>
-    <ExtendedAttributeList>
-      <ExtendedAttribute name="NamespaceObject"/>
-    </ExtendedAttributeList>
-    <Exception name="DeviceException" id="::acme::DeviceException">
-      <webidl>  exception DeviceException { };</webidl>
-    </Exception>
-    <Module name="pim" id="::acme::pim">
-      <webidl>  module pim {
-
-    [Constructor]
-    interface Contact { };
-
-    [Constructor,
-     NamedConstructor=RecurringEvent(long freq)]
-    interface CalendarEvent { };
-  };</webidl>
-      <Interface name="Contact" id="::acme::pim::Contact">
-        <webidl>    [Constructor]
-    interface Contact { };</webidl>
-        <ExtendedAttributeList>
-          <ExtendedAttribute name="Constructor"/>
-        </ExtendedAttributeList>
-      </Interface>
-      <Interface name="CalendarEvent" id="::acme::pim::CalendarEvent">
-        <webidl>    [Constructor,
-     NamedConstructor=RecurringEvent(long freq)]
-    interface CalendarEvent { };</webidl>
-        <ExtendedAttributeList>
-          <ExtendedAttribute name="Constructor"/>
-          <ExtendedAttribute name="NamedConstructor" value="RecurringEvent">
-            <ArgumentList>
-              <Argument name="freq">
-                <Type type="long"/>
-              </Argument>
-            </ArgumentList>
-          </ExtendedAttribute>
-        </ExtendedAttributeList>
-      </Interface>
-    </Module>
-  </Module>
-</Definitions>
diff --git a/webidl/valid/xml/nointerfaceobject.widlprocxml b/webidl/valid/xml/nointerfaceobject.widlprocxml
deleted file mode 100644
index f64f116b60fb8e..00000000000000
--- a/webidl/valid/xml/nointerfaceobject.widlprocxml
+++ /dev/null
@@ -1,28 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>[NoInterfaceObject]
-interface Query {
-  any lookupEntry(unsigned long key);
-};</webidl>
-  <Interface name="Query" id="::Query">
-    <webidl>[NoInterfaceObject]
-interface Query {
-  any lookupEntry(unsigned long key);
-};</webidl>
-    <ExtendedAttributeList>
-      <ExtendedAttribute name="NoInterfaceObject">
-        <webidl>NoInterfaceObject</webidl>
-      </ExtendedAttribute>
-    </ExtendedAttributeList>
-    <Operation name="lookupEntry" id="::Query::lookupEntry">
-      <webidl>  any lookupEntry(unsigned long key);</webidl>
-      <Type type="any"/>
-      <ArgumentList>
-        <Argument name="key">
-          <Type type="unsigned long"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/nullable.widlprocxml b/webidl/valid/xml/nullable.widlprocxml
deleted file mode 100644
index 8739e443262a62..00000000000000
--- a/webidl/valid/xml/nullable.widlprocxml
+++ /dev/null
@@ -1,29 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>interface MyConstants {
-  const boolean? ARE_WE_THERE_YET = false;
-};
-
-interface Node {
-  readonly attribute DOMString? namespaceURI;
-};</webidl>
-  <Interface name="MyConstants" id="::MyConstants">
-    <webidl>interface MyConstants {
-  const boolean? ARE_WE_THERE_YET = false;
-};</webidl>
-    <Const name="ARE_WE_THERE_YET" value="false" id="::MyConstants::ARE_WE_THERE_YET">
-      <webidl>  const boolean? ARE_WE_THERE_YET = false;</webidl>
-      <Type type="boolean" nullable="nullable"/>
-    </Const>
-  </Interface>
-  <Interface name="Node" id="::Node">
-    <webidl>interface Node {
-  readonly attribute DOMString? namespaceURI;
-};</webidl>
-    <Attribute readonly="readonly" name="namespaceURI" id="::Node::namespaceURI">
-      <webidl>  readonly attribute DOMString? namespaceURI;</webidl>
-      <Type type="DOMString" nullable="nullable"/>
-    </Attribute>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/nullableobjects.widlprocxml b/webidl/valid/xml/nullableobjects.widlprocxml
deleted file mode 100644
index 22d9fdd25d67c6..00000000000000
--- a/webidl/valid/xml/nullableobjects.widlprocxml
+++ /dev/null
@@ -1,46 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>interface A {
-};
-interface B {
-};
-interface C {
-  void f(<ref>A</ref>? x);
-  void f(<ref>B</ref>? x);
-
-};</webidl>
-  <Interface name="A" id="::A">
-    <webidl>interface A {
-};</webidl>
-  </Interface>
-  <Interface name="B" id="::B">
-    <webidl>interface B {
-};</webidl>
-  </Interface>
-  <Interface name="C" id="::C">
-    <webidl>interface C {
-  void f(<ref>A</ref>? x);
-  void f(<ref>B</ref>? x);
-
-};</webidl>
-    <Operation name="f" id="::C::f">
-      <webidl>  void f(<ref>A</ref>? x);</webidl>
-      <Type type="void"/>
-      <ArgumentList>
-        <Argument name="x">
-          <Type name="A" nullable="nullable"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-    <Operation name="f" id="::C::f">
-      <webidl>  void f(<ref>B</ref>? x);</webidl>
-      <Type type="void"/>
-      <ArgumentList>
-        <Argument name="x">
-          <Type name="B" nullable="nullable"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/operation-optional-arg.widlprocxml b/webidl/valid/xml/operation-optional-arg.widlprocxml
deleted file mode 100644
index 54aef1f87e3870..00000000000000
--- a/webidl/valid/xml/operation-optional-arg.widlprocxml
+++ /dev/null
@@ -1,30 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>interface ColorCreator {
-  object createColor(float v1, float v2, float v3, optional float alpha = 3.5);
-};</webidl>
-  <Interface name="ColorCreator" id="::ColorCreator">
-    <webidl>interface ColorCreator {
-  object createColor(float v1, float v2, float v3, optional float alpha = 3.5);
-};</webidl>
-    <Operation name="createColor" id="::ColorCreator::createColor">
-      <webidl>  object createColor(float v1, float v2, float v3, optional float alpha = 3.5);</webidl>
-      <Type type="object"/>
-      <ArgumentList>
-        <Argument name="v1">
-          <Type type="float"/>
-        </Argument>
-        <Argument name="v2">
-          <Type type="float"/>
-        </Argument>
-        <Argument name="v3">
-          <Type type="float"/>
-        </Argument>
-        <Argument optional="optional" name="alpha" value="3.5">
-          <Type type="float"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/overloading.widlprocxml b/webidl/valid/xml/overloading.widlprocxml
deleted file mode 100644
index db6da7a68c779c..00000000000000
--- a/webidl/valid/xml/overloading.widlprocxml
+++ /dev/null
@@ -1,113 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>interface A {
-};
-
-interface B {
-};
-
-interface C {
-  void f(<ref>A</ref> x);
-  void f(<ref>B</ref> x);
-};
-
-interface A {
-void f(DOMString a);
-void f([AllowAny] DOMString a, DOMString b, float... c);
-void f();
-void f(long a, DOMString b, optional DOMString c, float... d);
-};</webidl>
-  <Interface name="A" id="::A">
-    <webidl>interface A {
-};</webidl>
-  </Interface>
-  <Interface name="B" id="::B">
-    <webidl>interface B {
-};</webidl>
-  </Interface>
-  <Interface name="C" id="::C">
-    <webidl>interface C {
-  void f(<ref>A</ref> x);
-  void f(<ref>B</ref> x);
-};</webidl>
-    <Operation name="f" id="::C::f">
-      <webidl>  void f(<ref>A</ref> x);</webidl>
-      <Type type="void"/>
-      <ArgumentList>
-        <Argument name="x">
-          <Type name="A"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-    <Operation name="f" id="::C::f">
-      <webidl>  void f(<ref>B</ref> x);</webidl>
-      <Type type="void"/>
-      <ArgumentList>
-        <Argument name="x">
-          <Type name="B"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-  </Interface>
-  <Interface name="A" id="::A">
-    <webidl>interface A {
-void f(DOMString a);
-void f([AllowAny] DOMString a, DOMString b, float... c);
-void f();
-void f(long a, DOMString b, optional DOMString c, float... d);
-};</webidl>
-    <Operation name="f" id="::A::f">
-      <webidl> void f(DOMString a);</webidl>
-      <Type type="void"/>
-      <ArgumentList>
-        <Argument name="a">
-          <Type type="DOMString"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-    <Operation name="f" id="::A::f">
-      <webidl> void f([AllowAny] DOMString a, DOMString b, float... c);</webidl>
-      <Type type="void"/>
-      <ArgumentList>
-        <Argument name="a">
-          <ExtendedAttributeList>
-            <ExtendedAttribute name="AllowAny">
-              <webidl>AllowAny</webidl>
-            </ExtendedAttribute>
-          </ExtendedAttributeList>
-          <Type type="DOMString"/>
-        </Argument>
-        <Argument name="b">
-          <Type type="DOMString"/>
-        </Argument>
-        <Argument ellipsis="ellipsis" name="c">
-          <Type type="float"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-    <Operation name="f" id="::A::f">
-      <webidl> void f();</webidl>
-      <Type type="void"/>
-      <ArgumentList/>
-    </Operation>
-    <Operation name="f" id="::A::f">
-      <webidl> void f(long a, DOMString b, optional DOMString c, float... d);</webidl>
-      <Type type="void"/>
-      <ArgumentList>
-        <Argument name="a">
-          <Type type="long"/>
-        </Argument>
-        <Argument name="b">
-          <Type type="DOMString"/>
-        </Argument>
-        <Argument optional="optional" name="c">
-          <Type type="DOMString"/>
-        </Argument>
-        <Argument ellipsis="ellipsis" name="d">
-          <Type type="float"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/overridebuiltins.widlprocxml b/webidl/valid/xml/overridebuiltins.widlprocxml
deleted file mode 100644
index 56c92517beb68d..00000000000000
--- a/webidl/valid/xml/overridebuiltins.widlprocxml
+++ /dev/null
@@ -1,34 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>[OverrideBuiltins]
-interface StringMap2 {
-  readonly attribute unsigned long length;
-  getter DOMString lookup(DOMString key);
-};</webidl>
-  <Interface name="StringMap2" id="::StringMap2">
-    <webidl>[OverrideBuiltins]
-interface StringMap2 {
-  readonly attribute unsigned long length;
-  getter DOMString lookup(DOMString key);
-};</webidl>
-    <ExtendedAttributeList>
-      <ExtendedAttribute name="OverrideBuiltins">
-        <webidl>OverrideBuiltins</webidl>
-      </ExtendedAttribute>
-    </ExtendedAttributeList>
-    <Attribute readonly="readonly" name="length" id="::StringMap2::length">
-      <webidl>  readonly attribute unsigned long length;</webidl>
-      <Type type="unsigned long"/>
-    </Attribute>
-    <Operation getter="getter" name="lookup" id="::StringMap2::lookup">
-      <webidl>  getter DOMString lookup(DOMString key);</webidl>
-      <Type type="DOMString"/>
-      <ArgumentList>
-        <Argument name="key">
-          <Type type="DOMString"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/partial-interface.widlprocxml b/webidl/valid/xml/partial-interface.widlprocxml
deleted file mode 100644
index 8d7dcb4e4f7868..00000000000000
--- a/webidl/valid/xml/partial-interface.widlprocxml
+++ /dev/null
@@ -1,29 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>interface Foo {
-  attribute DOMString bar;
-};
-
-partial interface Foo {
-  attribute DOMString quux;
-};</webidl>
-  <Interface name="Foo" id="::Foo">
-    <webidl>interface Foo {
-  attribute DOMString bar;
-};</webidl>
-    <Attribute name="bar" id="::Foo::bar">
-      <webidl>  attribute DOMString bar;</webidl>
-      <Type type="DOMString"/>
-    </Attribute>
-  </Interface>
-  <Interface name="Foo" partial="partial" id="::Foo">
-    <webidl>partial interface Foo {
-  attribute DOMString quux;
-};</webidl>
-    <Attribute name="quux" id="::Foo::quux">
-      <webidl>  attribute DOMString quux;</webidl>
-      <Type type="DOMString"/>
-    </Attribute>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/primitives.widlprocxml b/webidl/valid/xml/primitives.widlprocxml
deleted file mode 100644
index 46977a2d74e574..00000000000000
--- a/webidl/valid/xml/primitives.widlprocxml
+++ /dev/null
@@ -1,112 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>interface Primitives {
-  attribute boolean truth;
-  attribute byte character;
-  attribute octet value;
-  attribute short number;
-  attribute unsigned short positive;
-  attribute long big;
-  attribute unsigned long bigpositive;
-  attribute long long bigbig;
-  attribute  unsigned long long bigbigpositive;
-  attribute float real;
-  attribute double bigreal; 
-  attribute unrestricted float realwithinfinity;
-  attribute unrestricted double bigrealwithinfinity; 
-  attribute DOMString string; 
-  attribute ByteString bytes; 
-  attribute Date date;
-  attribute RegExp regexp;
-};</webidl>
-  <Interface name="Primitives" id="::Primitives">
-    <webidl>interface Primitives {
-  attribute boolean truth;
-  attribute byte character;
-  attribute octet value;
-  attribute short number;
-  attribute unsigned short positive;
-  attribute long big;
-  attribute unsigned long bigpositive;
-  attribute long long bigbig;
-  attribute  unsigned long long bigbigpositive;
-  attribute float real;
-  attribute double bigreal; 
-  attribute unrestricted float realwithinfinity;
-  attribute unrestricted double bigrealwithinfinity; 
-  attribute DOMString string; 
-  attribute ByteString bytes; 
-  attribute Date date;
-  attribute RegExp regexp;
-};</webidl>
-    <Attribute name="truth" id="::Primitives::truth">
-      <webidl>  attribute boolean truth;</webidl>
-      <Type type="boolean"/>
-    </Attribute>
-    <Attribute name="character" id="::Primitives::character">
-      <webidl>  attribute byte character;</webidl>
-      <Type type="byte"/>
-    </Attribute>
-    <Attribute name="value" id="::Primitives::value">
-      <webidl>  attribute octet value;</webidl>
-      <Type type="octet"/>
-    </Attribute>
-    <Attribute name="number" id="::Primitives::number">
-      <webidl>  attribute short number;</webidl>
-      <Type type="short"/>
-    </Attribute>
-    <Attribute name="positive" id="::Primitives::positive">
-      <webidl>  attribute unsigned short positive;</webidl>
-      <Type type="unsigned short"/>
-    </Attribute>
-    <Attribute name="big" id="::Primitives::big">
-      <webidl>  attribute long big;</webidl>
-      <Type type="long"/>
-    </Attribute>
-    <Attribute name="bigpositive" id="::Primitives::bigpositive">
-      <webidl>  attribute unsigned long bigpositive;</webidl>
-      <Type type="unsigned long"/>
-    </Attribute>
-    <Attribute name="bigbig" id="::Primitives::bigbig">
-      <webidl>  attribute long long bigbig;</webidl>
-      <Type type="long long"/>
-    </Attribute>
-    <Attribute name="bigbigpositive" id="::Primitives::bigbigpositive">
-      <webidl>  attribute  unsigned long long bigbigpositive;</webidl>
-      <Type type="unsigned long long"/>
-    </Attribute>
-    <Attribute name="real" id="::Primitives::real">
-      <webidl>  attribute float real;</webidl>
-      <Type type="float"/>
-    </Attribute>
-    <Attribute name="bigreal" id="::Primitives::bigreal">
-      <webidl>  attribute double bigreal;</webidl>
-      <Type type="double"/>
-    </Attribute>
-    <Attribute name="realwithinfinity" id="::Primitives::realwithinfinity">
-      <webidl>  attribute unrestricted float realwithinfinity;</webidl>
-      <Type type="unrestricted float"/>
-    </Attribute>
-    <Attribute name="bigrealwithinfinity" id="::Primitives::bigrealwithinfinity">
-      <webidl>  attribute unrestricted double bigrealwithinfinity;</webidl>
-      <Type type="unrestricted double"/>
-    </Attribute>
-    <Attribute name="string" id="::Primitives::string">
-      <webidl>  attribute DOMString string;</webidl>
-      <Type type="DOMString"/>
-    </Attribute>
-    <Attribute name="bytes" id="::Primitives::bytes">
-      <webidl>  attribute ByteString bytes;</webidl>
-      <Type type="ByteString"/>
-    </Attribute>
-    <Attribute name="date" id="::Primitives::date">
-      <webidl>  attribute Date date;</webidl>
-      <Type type="Date"/>
-    </Attribute>
-    <Attribute name="regexp" id="::Primitives::regexp">
-      <webidl>  attribute RegExp regexp;</webidl>
-      <Type type="RegExp"/>
-    </Attribute>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/prototyperoot.widlprocxml b/webidl/valid/xml/prototyperoot.widlprocxml
deleted file mode 100644
index 2e56cd75ec38a0..00000000000000
--- a/webidl/valid/xml/prototyperoot.widlprocxml
+++ /dev/null
@@ -1,23 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>[PrototypeRoot]
-interface Node {
-  readonly attribute unsigned short nodeType;
-};</webidl>
-  <Interface name="Node" id="::Node">
-    <webidl>[PrototypeRoot]
-interface Node {
-  readonly attribute unsigned short nodeType;
-};</webidl>
-    <ExtendedAttributeList>
-      <ExtendedAttribute name="PrototypeRoot">
-        <webidl>PrototypeRoot</webidl>
-      </ExtendedAttribute>
-    </ExtendedAttributeList>
-    <Attribute readonly="readonly" name="nodeType" id="::Node::nodeType">
-      <webidl>  readonly attribute unsigned short nodeType;</webidl>
-      <Type type="unsigned short"/>
-    </Attribute>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/putforwards.widlprocxml b/webidl/valid/xml/putforwards.widlprocxml
deleted file mode 100644
index 634fad55a56d53..00000000000000
--- a/webidl/valid/xml/putforwards.widlprocxml
+++ /dev/null
@@ -1,27 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>interface Person {
-  [PutForwards=full] readonly attribute <ref>Name</ref> name;
-  attribute unsigned short age;
-};</webidl>
-  <Interface name="Person" id="::Person">
-    <webidl>interface Person {
-  [PutForwards=full] readonly attribute <ref>Name</ref> name;
-  attribute unsigned short age;
-};</webidl>
-    <Attribute readonly="readonly" name="name" id="::Person::name">
-      <webidl>  [PutForwards=full] readonly attribute <ref>Name</ref> name;</webidl>
-      <ExtendedAttributeList>
-        <ExtendedAttribute name="PutForwards" value="full">
-          <webidl>PutForwards</webidl>
-        </ExtendedAttribute>
-      </ExtendedAttributeList>
-      <Type name="Name"/>
-    </Attribute>
-    <Attribute name="age" id="::Person::age">
-      <webidl>  attribute unsigned short age;</webidl>
-      <Type type="unsigned short"/>
-    </Attribute>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/reg-operations.widlprocxml b/webidl/valid/xml/reg-operations.widlprocxml
deleted file mode 100644
index 3b756ed68d894b..00000000000000
--- a/webidl/valid/xml/reg-operations.widlprocxml
+++ /dev/null
@@ -1,70 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>interface Dimensions {
-  attribute unsigned long width;
-  attribute unsigned long height;
-};
-
-exception NoPointerDevice { };
-
-interface Button {
-
-  boolean isMouseOver();
-
-  void setDimensions(<ref>Dimensions</ref> size);
-  void setDimensions(unsigned long width, unsigned long height);
-};</webidl>
-  <Interface name="Dimensions" id="::Dimensions">
-    <webidl>interface Dimensions {
-  attribute unsigned long width;
-  attribute unsigned long height;
-};</webidl>
-    <Attribute name="width" id="::Dimensions::width">
-      <webidl>  attribute unsigned long width;</webidl>
-      <Type type="unsigned long"/>
-    </Attribute>
-    <Attribute name="height" id="::Dimensions::height">
-      <webidl>  attribute unsigned long height;</webidl>
-      <Type type="unsigned long"/>
-    </Attribute>
-  </Interface>
-  <Exception name="NoPointerDevice" id="::NoPointerDevice">
-    <webidl>exception NoPointerDevice { };</webidl>
-  </Exception>
-  <Interface name="Button" id="::Button">
-    <webidl>interface Button {
-
-  boolean isMouseOver();
-
-  void setDimensions(<ref>Dimensions</ref> size);
-  void setDimensions(unsigned long width, unsigned long height);
-};</webidl>
-    <Operation name="isMouseOver" id="::Button::isMouseOver">
-      <webidl>  boolean isMouseOver();</webidl>
-      <Type type="boolean"/>
-      <ArgumentList/>
-    </Operation>
-    <Operation name="setDimensions" id="::Button::setDimensions">
-      <webidl>  void setDimensions(<ref>Dimensions</ref> size);</webidl>
-      <Type type="void"/>
-      <ArgumentList>
-        <Argument name="size">
-          <Type name="Dimensions"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-    <Operation name="setDimensions" id="::Button::setDimensions">
-      <webidl>  void setDimensions(unsigned long width, unsigned long height);</webidl>
-      <Type type="void"/>
-      <ArgumentList>
-        <Argument name="width">
-          <Type type="unsigned long"/>
-        </Argument>
-        <Argument name="height">
-          <Type type="unsigned long"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/replaceable.widlprocxml b/webidl/valid/xml/replaceable.widlprocxml
deleted file mode 100644
index f9762166825aa4..00000000000000
--- a/webidl/valid/xml/replaceable.widlprocxml
+++ /dev/null
@@ -1,28 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>interface Counter {
-  [Replaceable] readonly attribute unsigned long value;
-  void increment();
-};</webidl>
-  <Interface name="Counter" id="::Counter">
-    <webidl>interface Counter {
-  [Replaceable] readonly attribute unsigned long value;
-  void increment();
-};</webidl>
-    <Attribute readonly="readonly" name="value" id="::Counter::value">
-      <webidl>  [Replaceable] readonly attribute unsigned long value;</webidl>
-      <ExtendedAttributeList>
-        <ExtendedAttribute name="Replaceable">
-          <webidl>Replaceable</webidl>
-        </ExtendedAttribute>
-      </ExtendedAttributeList>
-      <Type type="unsigned long"/>
-    </Attribute>
-    <Operation name="increment" id="::Counter::increment">
-      <webidl>  void increment();</webidl>
-      <Type type="void"/>
-      <ArgumentList/>
-    </Operation>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/sequence.widlprocxml b/webidl/valid/xml/sequence.widlprocxml
deleted file mode 100644
index d5f4564175b93b..00000000000000
--- a/webidl/valid/xml/sequence.widlprocxml
+++ /dev/null
@@ -1,32 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>interface Canvas {
-  void drawPolygon(sequence&lt;float> coordinates);
-  sequence&lt;float> getInflectionPoints();
-};</webidl>
-  <Interface name="Canvas" id="::Canvas">
-    <webidl>interface Canvas {
-  void drawPolygon(sequence&lt;float> coordinates);
-  sequence&lt;float> getInflectionPoints();
-};</webidl>
-    <Operation name="drawPolygon" id="::Canvas::drawPolygon">
-      <webidl>  void drawPolygon(sequence&lt;float> coordinates);</webidl>
-      <Type type="void"/>
-      <ArgumentList>
-        <Argument name="coordinates">
-          <Type type="sequence">
-            <Type type="float"/>
-          </Type>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-    <Operation name="getInflectionPoints" id="::Canvas::getInflectionPoints">
-      <webidl>  sequence&lt;float> getInflectionPoints();</webidl>
-      <Type type="sequence">
-        <Type type="float"/>
-      </Type>
-      <ArgumentList/>
-    </Operation>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/serializer.widlprocxml b/webidl/valid/xml/serializer.widlprocxml
deleted file mode 100644
index eb4219f8a5e257..00000000000000
--- a/webidl/valid/xml/serializer.widlprocxml
+++ /dev/null
@@ -1,296 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>interface Transaction {
-  readonly attribute <ref>Account</ref> from;
-  readonly attribute <ref>Account</ref> to;
-  readonly attribute float amount;
-  readonly attribute DOMString description;
-  readonly attribute unsigned long number;
-
-  serializer;
-};
-
-interface Account {
-  attribute DOMString name;
-  attribute unsigned long number;
-  serializer DOMString serialize();
-};
-
-interface Transaction2 {
-  readonly attribute <ref>Account2</ref> from;
-  readonly attribute <ref>Account2</ref> to;
-  readonly attribute float amount;
-  readonly attribute DOMString description;
-  readonly attribute unsigned long number;
-
-  serializer = { from, to, amount, description };
-};
-
-interface Account2 {
-  attribute DOMString name;
-  attribute unsigned long number;
-  serializer = number;
-};
-
-interface Account3 {
-  attribute DOMString name;
-  attribute unsigned long number;
-
-  serializer = { attribute };
-};
-
-interface Account4 {
-  getter object getItem(unsigned long index);
-  serializer = { getter };
-};
-
-interface Account5 : <ref>Account</ref> {
-  attribute DOMString secondname;
-  serializer = { inherit, secondname };
-};
-
-interface Account6 : <ref>Account</ref> {
-  attribute DOMString secondname;
-  serializer = { inherit, attribute };
-};
-
-interface Account7 {
-  attribute DOMString name;
-  attribute unsigned long number;
-  serializer = [ name, number ];
-};
-
-interface Account8 {
-  getter object getItem(unsigned long index);
-  serializer = [ getter ];
-};</webidl>
-  <Interface name="Transaction" id="::Transaction">
-    <webidl>interface Transaction {
-  readonly attribute <ref>Account</ref> from;
-  readonly attribute <ref>Account</ref> to;
-  readonly attribute float amount;
-  readonly attribute DOMString description;
-  readonly attribute unsigned long number;
-
-  serializer;
-};</webidl>
-    <Attribute readonly="readonly" name="from" id="::Transaction::from">
-      <webidl>  readonly attribute <ref>Account</ref> from;</webidl>
-      <Type name="Account"/>
-    </Attribute>
-    <Attribute readonly="readonly" name="to" id="::Transaction::to">
-      <webidl>  readonly attribute <ref>Account</ref> to;</webidl>
-      <Type name="Account"/>
-    </Attribute>
-    <Attribute readonly="readonly" name="amount" id="::Transaction::amount">
-      <webidl>  readonly attribute float amount;</webidl>
-      <Type type="float"/>
-    </Attribute>
-    <Attribute readonly="readonly" name="description" id="::Transaction::description">
-      <webidl>  readonly attribute DOMString description;</webidl>
-      <Type type="DOMString"/>
-    </Attribute>
-    <Attribute readonly="readonly" name="number" id="::Transaction::number">
-      <webidl>  readonly attribute unsigned long number;</webidl>
-      <Type type="unsigned long"/>
-    </Attribute>
-    <Serializer>
-      <webidl>  serializer;</webidl>
-    </Serializer>
-  </Interface>
-  <Interface name="Account" id="::Account">
-    <webidl>interface Account {
-  attribute DOMString name;
-  attribute unsigned long number;
-  serializer DOMString serialize();
-};</webidl>
-    <Attribute name="name" id="::Account::name">
-      <webidl>  attribute DOMString name;</webidl>
-      <Type type="DOMString"/>
-    </Attribute>
-    <Attribute name="number" id="::Account::number">
-      <webidl>  attribute unsigned long number;</webidl>
-      <Type type="unsigned long"/>
-    </Attribute>
-    <Operation serializer="serializer" name="serialize" id="::Account::serialize">
-      <webidl>  serializer DOMString serialize();</webidl>
-      <Type type="DOMString"/>
-      <ArgumentList/>
-    </Operation>
-  </Interface>
-  <Interface name="Transaction2" id="::Transaction2">
-    <webidl>interface Transaction2 {
-  readonly attribute <ref>Account2</ref> from;
-  readonly attribute <ref>Account2</ref> to;
-  readonly attribute float amount;
-  readonly attribute DOMString description;
-  readonly attribute unsigned long number;
-
-  serializer = { from, to, amount, description };
-};</webidl>
-    <Attribute readonly="readonly" name="from" id="::Transaction2::from">
-      <webidl>  readonly attribute <ref>Account2</ref> from;</webidl>
-      <Type name="Account2"/>
-    </Attribute>
-    <Attribute readonly="readonly" name="to" id="::Transaction2::to">
-      <webidl>  readonly attribute <ref>Account2</ref> to;</webidl>
-      <Type name="Account2"/>
-    </Attribute>
-    <Attribute readonly="readonly" name="amount" id="::Transaction2::amount">
-      <webidl>  readonly attribute float amount;</webidl>
-      <Type type="float"/>
-    </Attribute>
-    <Attribute readonly="readonly" name="description" id="::Transaction2::description">
-      <webidl>  readonly attribute DOMString description;</webidl>
-      <Type type="DOMString"/>
-    </Attribute>
-    <Attribute readonly="readonly" name="number" id="::Transaction2::number">
-      <webidl>  readonly attribute unsigned long number;</webidl>
-      <Type type="unsigned long"/>
-    </Attribute>
-    <Serializer>
-      <webidl>  serializer = { from, to, amount, description };</webidl>
-      <Map pattern="selection">
-        <PatternAttribute name="from"/>
-        <PatternAttribute name="to"/>
-        <PatternAttribute name="amount"/>
-        <PatternAttribute name="description"/>
-      </Map>
-    </Serializer>
-  </Interface>
-  <Interface name="Account2" id="::Account2">
-    <webidl>interface Account2 {
-  attribute DOMString name;
-  attribute unsigned long number;
-  serializer = number;
-};</webidl>
-    <Attribute name="name" id="::Account2::name">
-      <webidl>  attribute DOMString name;</webidl>
-      <Type type="DOMString"/>
-    </Attribute>
-    <Attribute name="number" id="::Account2::number">
-      <webidl>  attribute unsigned long number;</webidl>
-      <Type type="unsigned long"/>
-    </Attribute>
-    <Serializer attribute="number">
-      <webidl>  serializer = number;</webidl>
-    </Serializer>
-  </Interface>
-  <Interface name="Account3" id="::Account3">
-    <webidl>interface Account3 {
-  attribute DOMString name;
-  attribute unsigned long number;
-
-  serializer = { attribute };
-};</webidl>
-    <Attribute name="name" id="::Account3::name">
-      <webidl>  attribute DOMString name;</webidl>
-      <Type type="DOMString"/>
-    </Attribute>
-    <Attribute name="number" id="::Account3::number">
-      <webidl>  attribute unsigned long number;</webidl>
-      <Type type="unsigned long"/>
-    </Attribute>
-    <Serializer>
-      <webidl>  serializer = { attribute };</webidl>
-      <Map pattern="all"/>
-    </Serializer>
-  </Interface>
-  <Interface name="Account4" id="::Account4">
-    <webidl>interface Account4 {
-  getter object getItem(unsigned long index);
-  serializer = { getter };
-};</webidl>
-    <Operation getter="getter" name="getItem" id="::Account4::getItem">
-      <webidl>  getter object getItem(unsigned long index);</webidl>
-      <Type type="object"/>
-      <ArgumentList>
-        <Argument name="index">
-          <Type type="unsigned long"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-    <Serializer>
-      <webidl>  serializer = { getter };</webidl>
-      <Map pattern="getter"/>
-    </Serializer>
-  </Interface>
-  <Interface name="Account5" id="::Account5">
-    <webidl>interface Account5 : <ref>Account</ref> {
-  attribute DOMString secondname;
-  serializer = { inherit, secondname };
-};</webidl>
-    <InterfaceInheritance>
-      <Name name="Account"/>
-    </InterfaceInheritance>
-    <Attribute name="secondname" id="::Account5::secondname">
-      <webidl>  attribute DOMString secondname;</webidl>
-      <Type type="DOMString"/>
-    </Attribute>
-    <Serializer>
-      <webidl>  serializer = { inherit, secondname };</webidl>
-      <Map inherit="inherit" pattern="selection">
-        <PatternAttribute name="secondname"/>
-      </Map>
-    </Serializer>
-  </Interface>
-  <Interface name="Account6" id="::Account6">
-    <webidl>interface Account6 : <ref>Account</ref> {
-  attribute DOMString secondname;
-  serializer = { inherit, attribute };
-};</webidl>
-    <InterfaceInheritance>
-      <Name name="Account"/>
-    </InterfaceInheritance>
-    <Attribute name="secondname" id="::Account6::secondname">
-      <webidl>  attribute DOMString secondname;</webidl>
-      <Type type="DOMString"/>
-    </Attribute>
-    <Serializer>
-      <webidl>  serializer = { inherit, attribute };</webidl>
-      <Map inherit="inherit" pattern="all"/>
-    </Serializer>
-  </Interface>
-  <Interface name="Account7" id="::Account7">
-    <webidl>interface Account7 {
-  attribute DOMString name;
-  attribute unsigned long number;
-  serializer = [ name, number ];
-};</webidl>
-    <Attribute name="name" id="::Account7::name">
-      <webidl>  attribute DOMString name;</webidl>
-      <Type type="DOMString"/>
-    </Attribute>
-    <Attribute name="number" id="::Account7::number">
-      <webidl>  attribute unsigned long number;</webidl>
-      <Type type="unsigned long"/>
-    </Attribute>
-    <Serializer>
-      <webidl>  serializer = [ name, number ];</webidl>
-      <List pattern="selection">
-        <PatternAttribute name="name"/>
-        <PatternAttribute name="number"/>
-      </List>
-    </Serializer>
-  </Interface>
-  <Interface name="Account8" id="::Account8">
-    <webidl>interface Account8 {
-  getter object getItem(unsigned long index);
-  serializer = [ getter ];
-};</webidl>
-    <Operation getter="getter" name="getItem" id="::Account8::getItem">
-      <webidl>  getter object getItem(unsigned long index);</webidl>
-      <Type type="object"/>
-      <ArgumentList>
-        <Argument name="index">
-          <Type type="unsigned long"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-    <Serializer>
-      <webidl>  serializer = [ getter ];</webidl>
-      <List pattern="getter"/>
-    </Serializer>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/special-omittable.widlprocxml b/webidl/valid/xml/special-omittable.widlprocxml
deleted file mode 100644
index 1986d190a80cdd..00000000000000
--- a/webidl/valid/xml/special-omittable.widlprocxml
+++ /dev/null
@@ -1,37 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <Interface name="Dictionary" id="::Dictionary">
-    <webidl>interface Dictionary {
-  readonly attribute unsigned long propertyCount;
-
-  omittable getter float getProperty(DOMString propertyName);
-  omittable setter void setProperty(DOMString propertyName, float propertyValue);
-};</webidl>
-    <Attribute readonly="readonly" name="propertyCount" id="::Dictionary::propertyCount">
-      <webidl>  readonly attribute unsigned long propertyCount;</webidl>
-      <Type type="unsigned long"/>
-    </Attribute>
-    <Operation omittable="omittable" getter="getter" name="getProperty" id="::Dictionary::getProperty">
-      <webidl>  omittable getter float getProperty(DOMString propertyName);</webidl>
-      <Type type="float"/>
-      <ArgumentList>
-        <Argument name="propertyName">
-          <Type type="DOMString"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-    <Operation omittable="omittable" setter="setter" name="setProperty" id="::Dictionary::setProperty">
-      <webidl>  omittable setter void setProperty(DOMString propertyName, float propertyValue);</webidl>
-      <Type type="void"/>
-      <ArgumentList>
-        <Argument name="propertyName">
-          <Type type="DOMString"/>
-        </Argument>
-        <Argument name="propertyValue">
-          <Type type="float"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/static.widlprocxml b/webidl/valid/xml/static.widlprocxml
deleted file mode 100644
index 03c14e16eba8c3..00000000000000
--- a/webidl/valid/xml/static.widlprocxml
+++ /dev/null
@@ -1,58 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>interface Point {  };
-
-interface Circle {
-  attribute float cx;
-  attribute float cy;
-  attribute float radius;
-
-  static readonly attribute long triangulationCount;
-  static <ref>Point</ref> triangulate(<ref>Circle</ref> c1, <ref>Circle</ref> c2, <ref>Circle</ref> c3);
-};</webidl>
-  <Interface name="Point" id="::Point">
-    <webidl>interface Point {  };</webidl>
-  </Interface>
-  <Interface name="Circle" id="::Circle">
-    <webidl>interface Circle {
-  attribute float cx;
-  attribute float cy;
-  attribute float radius;
-
-  static readonly attribute long triangulationCount;
-  static <ref>Point</ref> triangulate(<ref>Circle</ref> c1, <ref>Circle</ref> c2, <ref>Circle</ref> c3);
-};</webidl>
-    <Attribute name="cx" id="::Circle::cx">
-      <webidl>  attribute float cx;</webidl>
-      <Type type="float"/>
-    </Attribute>
-    <Attribute name="cy" id="::Circle::cy">
-      <webidl>  attribute float cy;</webidl>
-      <Type type="float"/>
-    </Attribute>
-    <Attribute name="radius" id="::Circle::radius">
-      <webidl>  attribute float radius;</webidl>
-      <Type type="float"/>
-    </Attribute>
-    <Attribute static="static" readonly="readonly" name="triangulationCount" id="::Circle::triangulationCount">
-      <webidl>  static readonly attribute long triangulationCount;</webidl>
-      <Type type="long"/>
-    </Attribute>
-    <Operation static="static" name="triangulate" id="::Circle::triangulate">
-      <webidl>  static <ref>Point</ref> triangulate(<ref>Circle</ref> c1, <ref>Circle</ref> c2, <ref>Circle</ref> c3);</webidl>
-      <Type name="Point"/>
-      <ArgumentList>
-        <Argument name="c1">
-          <Type name="Circle"/>
-        </Argument>
-        <Argument name="c2">
-          <Type name="Circle"/>
-        </Argument>
-        <Argument name="c3">
-          <Type name="Circle"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/stringifier-attribute.widlprocxml b/webidl/valid/xml/stringifier-attribute.widlprocxml
deleted file mode 100644
index 082ce4d341bbf4..00000000000000
--- a/webidl/valid/xml/stringifier-attribute.widlprocxml
+++ /dev/null
@@ -1,29 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>[Constructor]
-interface Student {
-  attribute unsigned long id;
-  stringifier attribute DOMString name;
-};</webidl>
-  <Interface name="Student" id="::Student">
-    <webidl>[Constructor]
-interface Student {
-  attribute unsigned long id;
-  stringifier attribute DOMString name;
-};</webidl>
-    <ExtendedAttributeList>
-      <ExtendedAttribute name="Constructor">
-        <webidl>Constructor</webidl>
-      </ExtendedAttribute>
-    </ExtendedAttributeList>
-    <Attribute name="id" id="::Student::id">
-      <webidl>  attribute unsigned long id;</webidl>
-      <Type type="unsigned long"/>
-    </Attribute>
-    <Attribute stringifier="stringifier" name="name" id="::Student::name">
-      <webidl>  stringifier attribute DOMString name;</webidl>
-      <Type type="DOMString"/>
-    </Attribute>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/stringifier-custom.widlprocxml b/webidl/valid/xml/stringifier-custom.widlprocxml
deleted file mode 100644
index cdab1ccfc37c1a..00000000000000
--- a/webidl/valid/xml/stringifier-custom.widlprocxml
+++ /dev/null
@@ -1,44 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>[Constructor]
-interface Student {
-  attribute unsigned long id;
-  attribute DOMString? familyName;
-  attribute DOMString givenName;
-
-  stringifier DOMString ();
-};</webidl>
-  <Interface name="Student" id="::Student">
-    <webidl>[Constructor]
-interface Student {
-  attribute unsigned long id;
-  attribute DOMString? familyName;
-  attribute DOMString givenName;
-
-  stringifier DOMString ();
-};</webidl>
-    <ExtendedAttributeList>
-      <ExtendedAttribute name="Constructor">
-        <webidl>Constructor</webidl>
-      </ExtendedAttribute>
-    </ExtendedAttributeList>
-    <Attribute name="id" id="::Student::id">
-      <webidl>  attribute unsigned long id;</webidl>
-      <Type type="unsigned long"/>
-    </Attribute>
-    <Attribute name="familyName" id="::Student::familyName">
-      <webidl>  attribute DOMString? familyName;</webidl>
-      <Type type="DOMString" nullable="nullable"/>
-    </Attribute>
-    <Attribute name="givenName" id="::Student::givenName">
-      <webidl>  attribute DOMString givenName;</webidl>
-      <Type type="DOMString"/>
-    </Attribute>
-    <Operation stringifier="stringifier">
-      <webidl>  stringifier DOMString ();</webidl>
-      <Type type="DOMString"/>
-      <ArgumentList/>
-    </Operation>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/stringifier.widlprocxml b/webidl/valid/xml/stringifier.widlprocxml
deleted file mode 100644
index 4a18b80b704b4f..00000000000000
--- a/webidl/valid/xml/stringifier.widlprocxml
+++ /dev/null
@@ -1,29 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>interface A {
-  stringifier DOMString ();
-};
-
-interface A {
-  stringifier;
-};</webidl>
-  <Interface name="A" id="::A">
-    <webidl>interface A {
-  stringifier DOMString ();
-};</webidl>
-    <Operation stringifier="stringifier">
-      <webidl>  stringifier DOMString ();</webidl>
-      <Type type="DOMString"/>
-      <ArgumentList/>
-    </Operation>
-  </Interface>
-  <Interface name="A" id="::A">
-    <webidl>interface A {
-  stringifier;
-};</webidl>
-    <Stringifier>
-      <webidl>  stringifier;</webidl>
-    </Stringifier>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/treatasnull.widlprocxml b/webidl/valid/xml/treatasnull.widlprocxml
deleted file mode 100644
index a57ae163f0b987..00000000000000
--- a/webidl/valid/xml/treatasnull.widlprocxml
+++ /dev/null
@@ -1,40 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>interface Dog {
-  attribute DOMString name;
-  attribute DOMString owner;
-
-  boolean isMemberOfBreed([TreatNullAs=EmptyString] DOMString breedName);
-};</webidl>
-  <Interface name="Dog" id="::Dog">
-    <webidl>interface Dog {
-  attribute DOMString name;
-  attribute DOMString owner;
-
-  boolean isMemberOfBreed([TreatNullAs=EmptyString] DOMString breedName);
-};</webidl>
-    <Attribute name="name" id="::Dog::name">
-      <webidl>  attribute DOMString name;</webidl>
-      <Type type="DOMString"/>
-    </Attribute>
-    <Attribute name="owner" id="::Dog::owner">
-      <webidl>  attribute DOMString owner;</webidl>
-      <Type type="DOMString"/>
-    </Attribute>
-    <Operation name="isMemberOfBreed" id="::Dog::isMemberOfBreed">
-      <webidl>  boolean isMemberOfBreed([TreatNullAs=EmptyString] DOMString breedName);</webidl>
-      <Type type="boolean"/>
-      <ArgumentList>
-        <Argument name="breedName">
-          <ExtendedAttributeList>
-            <ExtendedAttribute name="TreatNullAs" value="EmptyString">
-              <webidl>TreatNullAs</webidl>
-            </ExtendedAttribute>
-          </ExtendedAttributeList>
-          <Type type="DOMString"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/treatasundefined.widlprocxml b/webidl/valid/xml/treatasundefined.widlprocxml
deleted file mode 100644
index 17e71081da036b..00000000000000
--- a/webidl/valid/xml/treatasundefined.widlprocxml
+++ /dev/null
@@ -1,40 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>interface Cat {
-  attribute DOMString name;
-  attribute DOMString owner;
-
-  boolean isMemberOfBreed([TreatUndefinedAs=EmptyString] DOMString breedName);
-};</webidl>
-  <Interface name="Cat" id="::Cat">
-    <webidl>interface Cat {
-  attribute DOMString name;
-  attribute DOMString owner;
-
-  boolean isMemberOfBreed([TreatUndefinedAs=EmptyString] DOMString breedName);
-};</webidl>
-    <Attribute name="name" id="::Cat::name">
-      <webidl>  attribute DOMString name;</webidl>
-      <Type type="DOMString"/>
-    </Attribute>
-    <Attribute name="owner" id="::Cat::owner">
-      <webidl>  attribute DOMString owner;</webidl>
-      <Type type="DOMString"/>
-    </Attribute>
-    <Operation name="isMemberOfBreed" id="::Cat::isMemberOfBreed">
-      <webidl>  boolean isMemberOfBreed([TreatUndefinedAs=EmptyString] DOMString breedName);</webidl>
-      <Type type="boolean"/>
-      <ArgumentList>
-        <Argument name="breedName">
-          <ExtendedAttributeList>
-            <ExtendedAttribute name="TreatUndefinedAs" value="EmptyString">
-              <webidl>TreatUndefinedAs</webidl>
-            </ExtendedAttribute>
-          </ExtendedAttributeList>
-          <Type type="DOMString"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/typedef.widlprocxml b/webidl/valid/xml/typedef.widlprocxml
deleted file mode 100644
index 785f6706e6d675..00000000000000
--- a/webidl/valid/xml/typedef.widlprocxml
+++ /dev/null
@@ -1,100 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>      interface Point {
-        attribute float x;
-        attribute float y;
-      };
-
-      typedef sequence&lt;<ref>Point</ref>> PointSequence;
-
-      interface Rect {
-        attribute <ref>Point</ref> topleft;
-        attribute <ref>Point</ref> bottomright;
-      };
-
-  interface Widget {
-
-    readonly attribute <ref>Rect</ref> bounds;
-
-    boolean pointWithinBounds(<ref>Point</ref> p);
-    boolean allPointsWithinBounds(<ref>PointSequence</ref> ps);
-  };
-
-  typedef [Clamp] octet value;</webidl>
-  <Interface name="Point" id="::Point">
-    <webidl>      interface Point {
-        attribute float x;
-        attribute float y;
-      };</webidl>
-    <Attribute name="x" id="::Point::x">
-      <webidl>        attribute float x;</webidl>
-      <Type type="float"/>
-    </Attribute>
-    <Attribute name="y" id="::Point::y">
-      <webidl>        attribute float y;</webidl>
-      <Type type="float"/>
-    </Attribute>
-  </Interface>
-  <Typedef name="PointSequence" id="::PointSequence">
-    <webidl>      typedef sequence&lt;<ref>Point</ref>> PointSequence;</webidl>
-    <Type type="sequence">
-      <Type name="Point"/>
-    </Type>
-  </Typedef>
-  <Interface name="Rect" id="::Rect">
-    <webidl>      interface Rect {
-        attribute <ref>Point</ref> topleft;
-        attribute <ref>Point</ref> bottomright;
-      };</webidl>
-    <Attribute name="topleft" id="::Rect::topleft">
-      <webidl>        attribute <ref>Point</ref> topleft;</webidl>
-      <Type name="Point"/>
-    </Attribute>
-    <Attribute name="bottomright" id="::Rect::bottomright">
-      <webidl>        attribute <ref>Point</ref> bottomright;</webidl>
-      <Type name="Point"/>
-    </Attribute>
-  </Interface>
-  <Interface name="Widget" id="::Widget">
-    <webidl>  interface Widget {
-
-    readonly attribute <ref>Rect</ref> bounds;
-
-    boolean pointWithinBounds(<ref>Point</ref> p);
-    boolean allPointsWithinBounds(<ref>PointSequence</ref> ps);
-  };</webidl>
-    <Attribute readonly="readonly" name="bounds" id="::Widget::bounds">
-      <webidl>    readonly attribute <ref>Rect</ref> bounds;</webidl>
-      <Type name="Rect"/>
-    </Attribute>
-    <Operation name="pointWithinBounds" id="::Widget::pointWithinBounds">
-      <webidl>    boolean pointWithinBounds(<ref>Point</ref> p);</webidl>
-      <Type type="boolean"/>
-      <ArgumentList>
-        <Argument name="p">
-          <Type name="Point"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-    <Operation name="allPointsWithinBounds" id="::Widget::allPointsWithinBounds">
-      <webidl>    boolean allPointsWithinBounds(<ref>PointSequence</ref> ps);</webidl>
-      <Type type="boolean"/>
-      <ArgumentList>
-        <Argument name="ps">
-          <Type name="PointSequence"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-  </Interface>
-  <Typedef name="value" id="::value">
-    <webidl>  typedef [Clamp] octet value;</webidl>
-    <Type type="octet">
-      <ExtendedAttributeList>
-        <ExtendedAttribute name="Clamp">
-          <webidl>Clamp</webidl>
-        </ExtendedAttribute>
-      </ExtendedAttributeList>
-    </Type>
-  </Typedef>
-</Definitions>
diff --git a/webidl/valid/xml/typesuffixes.widlprocxml b/webidl/valid/xml/typesuffixes.widlprocxml
deleted file mode 100644
index 830fe62bc0df11..00000000000000
--- a/webidl/valid/xml/typesuffixes.widlprocxml
+++ /dev/null
@@ -1,25 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>interface Suffixes {
-  void test(sequence&lt;DOMString[]?>? foo);
-};</webidl>
-  <Interface name="Suffixes" id="::Suffixes">
-    <webidl>interface Suffixes {
-  void test(sequence&lt;DOMString[]?>? foo);
-};</webidl>
-    <Operation name="test" id="::Suffixes::test">
-      <webidl>  void test(sequence&lt;DOMString[]?>? foo);</webidl>
-      <Type type="void"/>
-      <ArgumentList>
-        <Argument name="foo">
-          <Type type="sequence" nullable="nullable">
-            <Type type="array" nullable="nullable">
-              <Type type="DOMString"/>
-            </Type>
-          </Type>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/uniontype.widlprocxml b/webidl/valid/xml/uniontype.widlprocxml
deleted file mode 100644
index 7d088079956a11..00000000000000
--- a/webidl/valid/xml/uniontype.widlprocxml
+++ /dev/null
@@ -1,26 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>interface Union {
- attribute (float or (Date or <ref>Event</ref>) or (<ref>Node</ref> or DOMString)?) test;
-};</webidl>
-  <Interface name="Union" id="::Union">
-    <webidl>interface Union {
- attribute (float or (Date or <ref>Event</ref>) or (<ref>Node</ref> or DOMString)?) test;
-};</webidl>
-    <Attribute name="test" id="::Union::test">
-      <webidl> attribute (float or (Date or <ref>Event</ref>) or (<ref>Node</ref> or DOMString)?) test;</webidl>
-      <Type type="union">
-        <Type type="float"/>
-        <Type type="union">
-          <Type type="Date"/>
-          <Type name="Event"/>
-        </Type>
-        <Type type="union" nullable="nullable">
-          <Type name="Node"/>
-          <Type type="DOMString"/>
-        </Type>
-      </Type>
-    </Attribute>
-  </Interface>
-</Definitions>
diff --git a/webidl/valid/xml/variadic-operations.widlprocxml b/webidl/valid/xml/variadic-operations.widlprocxml
deleted file mode 100644
index 0bc9f784413785..00000000000000
--- a/webidl/valid/xml/variadic-operations.widlprocxml
+++ /dev/null
@@ -1,40 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE Definitions SYSTEM "widlprocxml.dtd">
-<Definitions>
-  <webidl>interface IntegerSet {
-  readonly attribute unsigned long cardinality;
-
-  void union(long... ints);
-  void intersection(long... ints);
-};</webidl>
-  <Interface name="IntegerSet" id="::IntegerSet">
-    <webidl>interface IntegerSet {
-  readonly attribute unsigned long cardinality;
-
-  void union(long... ints);
-  void intersection(long... ints);
-};</webidl>
-    <Attribute readonly="readonly" name="cardinality" id="::IntegerSet::cardinality">
-      <webidl>  readonly attribute unsigned long cardinality;</webidl>
-      <Type type="unsigned long"/>
-    </Attribute>
-    <Operation name="union" id="::IntegerSet::union">
-      <webidl>  void union(long... ints);</webidl>
-      <Type type="void"/>
-      <ArgumentList>
-        <Argument ellipsis="ellipsis" name="ints">
-          <Type type="long"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-    <Operation name="intersection" id="::IntegerSet::intersection">
-      <webidl>  void intersection(long... ints);</webidl>
-      <Type type="void"/>
-      <ArgumentList>
-        <Argument ellipsis="ellipsis" name="ints">
-          <Type type="long"/>
-        </Argument>
-      </ArgumentList>
-    </Operation>
-  </Interface>
-</Definitions>