diff --git a/guide/src/main/asciidoc/changelog.adoc b/guide/src/main/asciidoc/changelog.adoc
index 7356289..5b1de93 100644
--- a/guide/src/main/asciidoc/changelog.adoc
+++ b/guide/src/main/asciidoc/changelog.adoc
@@ -1,4 +1,11 @@
 == Changelog
+* 2024-01-31
+** new: a document may also be a singleton that's not part of a collection (<<document-singleton>>)
+** new: path parameter names should use lowerCamelCase <<rule-path-param>>
+** update: clarify that query parameters should use lowerCamelCase <<rule-uri-notat>>
+** update: the name of a multi-value query parameter should be singular if it's a noun <<rule-qry-multi>>
+** new: explicit rule and clearer guidelines on `GET /health` resource <<rule-hlth-res>>
+
 * 2023-10-05
 ** update: <<rule-req-valid>> issue type for unknown input is renamed
 ** new: rule <<rule-hdr-case>> on case-insensitivity of HTTP headers
diff --git a/guide/src/main/asciidoc/index.adoc b/guide/src/main/asciidoc/index.adoc
index 136ff12..1f334ce 100644
--- a/guide/src/main/asciidoc/index.adoc
+++ b/guide/src/main/asciidoc/index.adoc
@@ -1,4 +1,4 @@
-:update-date: 2023-10-05
+:update-date: 2024-01-31
 :doctype: book
 :docinfo:
 :toc: left
diff --git a/guide/src/main/asciidoc/resources-document.adoc b/guide/src/main/asciidoc/resources-document.adoc
index 68bebc7..8b38260 100644
--- a/guide/src/main/asciidoc/resources-document.adoc
+++ b/guide/src/main/asciidoc/resources-document.adoc
@@ -26,6 +26,7 @@ a|
 |`/persons/{ssin}`
 ====
 
+[[document-singleton, Singleton documents]]
 *Singleton documents*
 
 Documents may also be _singletons_, of which only a single instance exists within the context of its parent, if any. A singleton document's URI ends with a *fixed path segment that is a singular noun*.