diff --git a/packages/ember-runtime/lib/system/string.js b/packages/ember-runtime/lib/system/string.js
index 87122528c39..7d5c4986740 100644
--- a/packages/ember-runtime/lib/system/string.js
+++ b/packages/ember-runtime/lib/system/string.js
@@ -16,44 +16,50 @@ var STRING_DASHERIZE_CACHE = new Cache(1000, function(key) {
   return decamelize(key).replace(STRING_DASHERIZE_REGEXP, '-');
 });
 
+var STRING_CAMELIZE_REGEXP_1 = (/(\-|\_|\.|\s)+(.)?/g);
+var STRING_CAMELIZE_REGEXP_2 = (/(^|\/)([A-Z])/g);
+
 var CAMELIZE_CACHE = new Cache(1000, function(key) {
-  return key.replace(STRING_CAMELIZE_REGEXP, function(match, separator, chr) {
+  return key.replace(STRING_CAMELIZE_REGEXP_1, function(match, separator, chr) {
     return chr ? chr.toUpperCase() : '';
-  }).replace(/^([A-Z])/, function(match, separator, chr) {
+  }).replace(STRING_CAMELIZE_REGEXP_2, function(match, separator, chr) {
     return match.toLowerCase();
   });
 });
 
-var CLASSIFY_CACHE = new Cache(1000, function(str) {
-  var parts = str.split(".");
-  var out = [];
+var STRING_CLASSIFY_REGEXP_1 = (/(\-|\_|\.|\s)+(.)?/g);
+var STRING_CLASSIFY_REGEXP_2 = (/(^|\/|\.)([a-z])/g);
 
-  for (var i=0, l=parts.length; i<l; i++) {
-    var camelized = camelize(parts[i]);
-    out.push(camelized.charAt(0).toUpperCase() + camelized.substr(1));
-  }
-
-  return out.join(".");
+var CLASSIFY_CACHE = new Cache(1000, function(str) {
+  return str.replace(STRING_CLASSIFY_REGEXP_1, function(match, separator, chr) {
+    return chr ? chr.toUpperCase() : '';
+  }).replace(STRING_CLASSIFY_REGEXP_2, function(match, separator, chr) {
+    return match.toUpperCase();
+  });
 });
 
+var STRING_UNDERSCORE_REGEXP_1 = (/([a-z\d])([A-Z]+)/g);
+var STRING_UNDERSCORE_REGEXP_2 = (/\-|\s+/g);
+
 var UNDERSCORE_CACHE = new Cache(1000, function(str) {
   return str.replace(STRING_UNDERSCORE_REGEXP_1, '$1_$2').
     replace(STRING_UNDERSCORE_REGEXP_2, '_').toLowerCase();
 });
 
+var STRING_CAPITALIZE_REGEXP = (/(^|\/)([a-z])/g);
+
 var CAPITALIZE_CACHE = new Cache(1000, function(str) {
-  return str.charAt(0).toUpperCase() + str.substr(1);
+  return str.replace(STRING_CAPITALIZE_REGEXP, function(match, separator, chr) {
+    return match.toUpperCase();
+  });
 });
 
+var STRING_DECAMELIZE_REGEXP = (/([a-z\d])([A-Z])/g);
+
 var DECAMELIZE_CACHE = new Cache(1000, function(str) {
   return str.replace(STRING_DECAMELIZE_REGEXP, '$1_$2').toLowerCase();
 });
 
-var STRING_DECAMELIZE_REGEXP = (/([a-z\d])([A-Z])/g);
-var STRING_CAMELIZE_REGEXP = (/(\-|_|\.|\s)+(.)?/g);
-var STRING_UNDERSCORE_REGEXP_1 = (/([a-z\d])([A-Z]+)/g);
-var STRING_UNDERSCORE_REGEXP_2 = (/\-|\s+/g);
-
 function fmt(str, formats) {
   var cachedFormats = formats;
 
@@ -225,6 +231,7 @@ export default {
     'action_name'.dasherize();        // 'action-name'
     'css-class-name'.dasherize();     // 'css-class-name'
     'my favorite items'.dasherize();  // 'my-favorite-items'
+    'privateDocs/ownerInvoice'.dasherize(); // 'private-docs/owner-invoice'
     ```
 
     @method dasherize
@@ -242,6 +249,7 @@ export default {
     'css-class-name'.camelize();     // 'cssClassName'
     'my favorite items'.camelize();  // 'myFavoriteItems'
     'My Favorite Items'.camelize();  // 'myFavoriteItems'
+    'private-docs/owner-invoice'.camelize(); // 'privateDocs/ownerInvoice'
     ```
 
     @method camelize
@@ -258,6 +266,7 @@ export default {
     'action_name'.classify();        // 'ActionName'
     'css-class-name'.classify();     // 'CssClassName'
     'my favorite items'.classify();  // 'MyFavoriteItems'
+    'private-docs/owner-invoice'.classify(); // 'PrivateDocs/OwnerInvoice'
     ```
 
     @method classify
@@ -275,6 +284,7 @@ export default {
     'action_name'.underscore();        // 'action_name'
     'css-class-name'.underscore();     // 'css_class_name'
     'my favorite items'.underscore();  // 'my_favorite_items'
+    'privateDocs/ownerInvoice'.underscore(); // 'private_docs/owner_invoice'
     ```
 
     @method underscore
@@ -291,6 +301,7 @@ export default {
     'action_name'.capitalize()       // 'Action_name'
     'css-class-name'.capitalize()    // 'Css-class-name'
     'my favorite items'.capitalize() // 'My favorite items'
+    'privateDocs/ownerInvoice'.capitalize(); // 'PrivateDocs/OwnerInvoice'
     ```
 
     @method capitalize
diff --git a/packages/ember-runtime/tests/system/string/camelize_test.js b/packages/ember-runtime/tests/system/string/camelize_test.js
index 805b08aacab..1056f931d13 100644
--- a/packages/ember-runtime/tests/system/string/camelize_test.js
+++ b/packages/ember-runtime/tests/system/string/camelize_test.js
@@ -50,3 +50,24 @@ QUnit.test("does nothing with camelcased string", function() {
     deepEqual('innerHTML'.camelize(), 'innerHTML');
   }
 });
+
+QUnit.test("camelize namespaced classified string", function() {
+  deepEqual(camelize('PrivateDocs/OwnerInvoice'), 'privateDocs/ownerInvoice');
+  if (Ember.EXTEND_PROTOTYPES) {
+    deepEqual('PrivateDocs/OwnerInvoice'.camelize(), 'privateDocs/ownerInvoice');
+  }
+});
+
+QUnit.test("camelize namespaced underscored string", function() {
+  deepEqual(camelize('private_docs/owner_invoice'), 'privateDocs/ownerInvoice');
+  if (Ember.EXTEND_PROTOTYPES) {
+    deepEqual('private_docs/owner_invoice'.camelize(), 'privateDocs/ownerInvoice');
+  }
+});
+
+QUnit.test("camelize namespaced dasherized string", function() {
+  deepEqual(camelize('private-docs/owner-invoice'), 'privateDocs/ownerInvoice');
+  if (Ember.EXTEND_PROTOTYPES) {
+    deepEqual('private-docs/owner-invoice'.camelize(), 'privateDocs/ownerInvoice');
+  }
+});
diff --git a/packages/ember-runtime/tests/system/string/capitalize_test.js b/packages/ember-runtime/tests/system/string/capitalize_test.js
index 74288e28ddd..d0115d3af67 100644
--- a/packages/ember-runtime/tests/system/string/capitalize_test.js
+++ b/packages/ember-runtime/tests/system/string/capitalize_test.js
@@ -43,3 +43,24 @@ QUnit.test("does nothing with capitalized string", function() {
     deepEqual('Capitalized string'.capitalize(), 'Capitalized string');
   }
 });
+
+QUnit.test("capitalize namespaced camelized string", function() {
+  deepEqual(capitalize('privateDocs/ownerInvoice'), 'PrivateDocs/OwnerInvoice');
+  if (Ember.EXTEND_PROTOTYPES) {
+    deepEqual('privateDocs/ownerInvoice'.capitalize(), 'PrivateDocs/OwnerInvoice');
+  }
+});
+
+QUnit.test("capitalize namespaced underscored string", function() {
+  deepEqual(capitalize('private_docs/owner_invoice'), 'Private_docs/Owner_invoice');
+  if (Ember.EXTEND_PROTOTYPES) {
+    deepEqual('private_docs/owner_invoice'.capitalize(), 'Private_docs/Owner_invoice');
+  }
+});
+
+QUnit.test("capitalize namespaced dasherized string", function() {
+  deepEqual(capitalize('private-docs/owner-invoice'), 'Private-docs/Owner-invoice');
+  if (Ember.EXTEND_PROTOTYPES) {
+    deepEqual('private-docs/owner-invoice'.capitalize(), 'Private-docs/Owner-invoice');
+  }
+});
diff --git a/packages/ember-runtime/tests/system/string/classify_test.js b/packages/ember-runtime/tests/system/string/classify_test.js
index eb3f5b5644d..7012575068e 100644
--- a/packages/ember-runtime/tests/system/string/classify_test.js
+++ b/packages/ember-runtime/tests/system/string/classify_test.js
@@ -36,3 +36,24 @@ QUnit.test("does nothing with classified string", function() {
     deepEqual('InnerHTML'.classify(), 'InnerHTML');
   }
 });
+
+QUnit.test("classify namespaced camelized string", function() {
+  deepEqual(classify('privateDocs/ownerInvoice'), 'PrivateDocs/OwnerInvoice');
+  if (Ember.EXTEND_PROTOTYPES) {
+    deepEqual('privateDocs/ownerInvoice'.classify(), 'PrivateDocs/OwnerInvoice');
+  }
+});
+
+QUnit.test("classify namespaced underscored string", function() {
+  deepEqual(classify('private_docs/owner_invoice'), 'PrivateDocs/OwnerInvoice');
+  if (Ember.EXTEND_PROTOTYPES) {
+    deepEqual('private_docs/owner_invoice'.classify(), 'PrivateDocs/OwnerInvoice');
+  }
+});
+
+QUnit.test("classify namespaced dasherized string", function() {
+  deepEqual(classify('private-docs/owner-invoice'), 'PrivateDocs/OwnerInvoice');
+  if (Ember.EXTEND_PROTOTYPES) {
+    deepEqual('private-docs/owner-invoice'.classify(), 'PrivateDocs/OwnerInvoice');
+  }
+});
diff --git a/packages/ember-runtime/tests/system/string/dasherize_test.js b/packages/ember-runtime/tests/system/string/dasherize_test.js
index 5a2b1e88e7c..5aa0eb69d2e 100644
--- a/packages/ember-runtime/tests/system/string/dasherize_test.js
+++ b/packages/ember-runtime/tests/system/string/dasherize_test.js
@@ -43,3 +43,24 @@ QUnit.test("dasherize string that is the property name of Object.prototype", fun
     deepEqual('toString'.dasherize(), 'to-string');
   }
 });
+
+QUnit.test("dasherize namespaced classified string", function() {
+  deepEqual(dasherize('PrivateDocs/OwnerInvoice'), 'private-docs/owner-invoice');
+  if (Ember.EXTEND_PROTOTYPES) {
+    deepEqual('PrivateDocs/OwnerInvoice'.dasherize(), 'private-docs/owner-invoice');
+  }
+});
+
+QUnit.test("dasherize namespaced camelized string", function() {
+  deepEqual(dasherize('privateDocs/ownerInvoice'), 'private-docs/owner-invoice');
+  if (Ember.EXTEND_PROTOTYPES) {
+    deepEqual('privateDocs/ownerInvoice'.dasherize(), 'private-docs/owner-invoice');
+  }
+});
+
+QUnit.test("dasherize namespaced underscored string", function() {
+  deepEqual(dasherize('private_docs/owner_invoice'), 'private-docs/owner-invoice');
+  if (Ember.EXTEND_PROTOTYPES) {
+    deepEqual('private_docs/owner_invoice'.dasherize(), 'private-docs/owner-invoice');
+  }
+});
diff --git a/packages/ember-runtime/tests/system/string/decamelize_test.js b/packages/ember-runtime/tests/system/string/decamelize_test.js
index 17f1b8d1399..a23c69170ce 100644
--- a/packages/ember-runtime/tests/system/string/decamelize_test.js
+++ b/packages/ember-runtime/tests/system/string/decamelize_test.js
@@ -43,3 +43,17 @@ QUnit.test("decamelizes strings with numbers", function() {
     deepEqual('size160Url'.decamelize(), 'size160_url');
   }
 });
+
+QUnit.test("decamelize namespaced classified string", function() {
+  deepEqual(decamelize('PrivateDocs/OwnerInvoice'), 'private_docs/owner_invoice');
+  if (Ember.EXTEND_PROTOTYPES) {
+    deepEqual('PrivateDocs/OwnerInvoice'.decamelize(), 'private_docs/owner_invoice');
+  }
+});
+
+QUnit.test("decamelize namespaced camelized string", function() {
+  deepEqual(decamelize('privateDocs/ownerInvoice'), 'private_docs/owner_invoice');
+  if (Ember.EXTEND_PROTOTYPES) {
+    deepEqual('privateDocs/ownerInvoice'.decamelize(), 'private_docs/owner_invoice');
+  }
+});
diff --git a/packages/ember-runtime/tests/system/string/underscore_test.js b/packages/ember-runtime/tests/system/string/underscore_test.js
index bededdcf240..fdab64c4fe1 100644
--- a/packages/ember-runtime/tests/system/string/underscore_test.js
+++ b/packages/ember-runtime/tests/system/string/underscore_test.js
@@ -36,3 +36,24 @@ QUnit.test("with camelcased string", function() {
     deepEqual('innerHTML'.underscore(), 'inner_html');
   }
 });
+
+QUnit.test("underscore namespaced classified string", function() {
+  deepEqual(underscore('PrivateDocs/OwnerInvoice'), 'private_docs/owner_invoice');
+  if (Ember.EXTEND_PROTOTYPES) {
+    deepEqual('PrivateDocs/OwnerInvoice'.underscore(), 'private_docs/owner_invoice');
+  }
+});
+
+QUnit.test("underscore namespaced camelized string", function() {
+  deepEqual(underscore('privateDocs/ownerInvoice'), 'private_docs/owner_invoice');
+  if (Ember.EXTEND_PROTOTYPES) {
+    deepEqual('privateDocs/ownerInvoice'.underscore(), 'private_docs/owner_invoice');
+  }
+});
+
+QUnit.test("underscore namespaced dasherized string", function() {
+  deepEqual(underscore('private-docs/owner-invoice'), 'private_docs/owner_invoice');
+  if (Ember.EXTEND_PROTOTYPES) {
+    deepEqual('private-docs/owner-invoice'.underscore(), 'private_docs/owner_invoice');
+  }
+});