GH-100: Literal equality and language tags

w3c · Oct 24, 2024 · 209dde6 · 209dde6
1 parent e642dbf
commit 209dde6
Showing 1 changed file with 16 additions and 9 deletions.
diff --git a/spec/index.html b/spec/index.html
@@ -747,9 +747,9 @@ <h2>Literals</h2>
 
     <p>A literal is a <dfn>language-tagged string</dfn> if the third element
       is present and the fourth element is not present.
-       Lexical representations of language tags
-       MAY be case normalized,
-       (for example, by converting to lower case).
+      Lexical representations of language tags MAY be case normalized,
+      (for example, by canonicalizing as defined by 
+      <a data-cite="bcp47#section-4.5">BCP 47 section 4.5</a>).
       </p>
 
     <p>A literal is a <dfn id="dfn-dir-lang-string">directional language-tagged string</dfn>
@@ -804,12 +804,19 @@ <h2>Literals</h2>
 
     <p><dfn data-local-lt="term-equal">Literal term equality</dfn>:
       Two literals are term-equal (the same <a>RDF literal</a>)
-      if and only if the two <a>lexical forms</a>,
-      the two <a>datatype IRIs</a>,
-      the two <a>language tags</a> (if any), and
-      the two <a>base directions</a> (if any) compare equal,
-      using <a data-cite="I18N-GLOSSARY#dfn-case-sensitive">case sensitive matching</a>
-      (see description of string comparison in <a href="#rdf-strings" class="sectionRef"></a>).
+      if and only if:
+      <ul>
+        <li>the two <a>lexical forms</a> compare equal</li>
+        <li>the two <a>datatype IRIs</a> compare equal</li>
+        <li>the two <a>language tags</a> (if any) compare equal</li>
+        <li>the two <a>base directions</a> (if any) compare equal</li>
+      </ul>
+      Comparison is performed using 
+      <a data-cite="I18N-GLOSSARY#dfn-case-sensitive">case sensitive matching</a>
+      (see description of string comparison in 
+      <a href="#rdf-strings" class="sectionRef"></a>)
+      except for language tags, where the comparison is performed using 
+      <a data-cite="I18N-GLOSSARY#dfn-case-sensitive">ASCII case-insensitive matching</a>.
       Thus, two literals can have the same value
       without being the same <a>RDF term</a>.
       For example:</p>