isLANG and LANGDIR

w3c · Jul 13, 2023 · 571ef20 · 571ef20
1 parent 6f17438
commit 571ef20
Showing 1 changed file with 84 additions and 17 deletions.
diff --git a/spec/index.html b/spec/index.html
@@ -6253,7 +6253,7 @@ <h5>LANG</h5>
             </div>
 
             <p>@@LANGDIR@@ Revisions for LANGDIR</p>
-            <table role="table">
+            <table>
               <thead>
                 <tr>
                   <th>Function</th>
@@ -6286,29 +6286,96 @@ <h5>LANG</h5>
           </section>
           <section id="func-islang">
             <h5>isLANG</h5>
-            <pre class="prototype nohighlight"> <span class="return">xsd:string</span>  <span class="operator">isLANG</span> (<span class="type"><span class="type literal">literal</span></span> <span class="name">ltrl</span>)
+            <pre class="prototype nohighlight"> <span class="return">xsd:string</span>  <span class="operator">isLANG</span> (<span class="type">RDF term</span> <span class="name">term</span>)
             </pre>
-            <p>@@LANGDIR@@</p>
-            <pre>
-              isLANG(?x) -> ( DATATYPE(?x) = rdf:i18nString || DATATYPE(?x) = rdf:langString )
-            </pre>
-
+            <p>
+              The function <code>isLang</code> returns <code>true</code> if the
+              argument is a literal with a language
+              tag. Otherwise, the function returns false.
+            </p>
+            <p>If the argument is a lteral, the function is
+              equivalent to testing for the datatype of the
+              literal being either <code>rdf:langString</code>
+              or <code>rdf:dirLangString</code>.
+            </p>
+             <div class="result">
+               <table>
+                 <thead>
+                   <tr>
+                     <th>Expression</th>
+                     <th><code>Result</code></th>
+                   </tr>
+                 </thead>
+                 <tbody>
+                   <tr>
+                     <td><code>isLANG("abc"@en)</code></td>
+                     <td><code>true</code></td>
+                   </tr>
+                   <tr>
+                     <td><code>isLANG(1)</code></td>
+                     <td><code>false</code></td>
+                   </tr>
+                   <tr>
+                     <td><code>isLANG(&lt;http://example/&gt;)</code></td>
+                     <td><code>false</code></td>
+                   </tr>
+                   <tr>
+                     <td><code>isLANG("abc@en--ltrl"</code></td>
+                     <td><code>true</code></td>
+                   </tr>
+                   <tr>
+                     <td><code>isLANG("تصميم المواقع"@ar-ltr)</code></td>
+                     <td><code>true</code></td>
+                   </tr>
+                 </tbody>
+               </table>
+             </div>
           </section>
           <section id="func-langdir">
             <h5>LANGDIR</h5>
             <pre class="prototype nohighlight"> <span class="return">xsd:string</span>  <span class="operator">LANGDIR</span> (<span class="type"><span class="type literal">literal</span></span> <span class="name">ltrl</span>)
             </pre>
-            <p>@@LANGDIR@@</p>
-            <pre>
-LANGDIR("abc"@ar--rtl) -> "rtl"
-LANGDIR("abc"@ar) -> ""
-LANGDIR("abc") -> ""
-LANGDIR(1) -> ""
-LANGDIR(<uri>) -> error
-            </pre>
+            <p>
+              If the argument is a literal, 
+              The function <code>LANGDIR</code> returns the
+              language direction of a leiterl with datatype
+              <code>rdf:dirLangString</code>.
+              Otherwise, the function return the empty
+              string.
+            </p>
+            <div class="result">
+              <table>
+                <thead>
+                  <tr>
+                    <th>Expression</th>
+                    <th><code>Result</code></th>
+                  </tr>
+                </thead>
+                <tbody>
+                  <tr>
+                    <td><code>LANGDIR("abc"@en--ltr)</code></td>
+                    <td><code>"ltr"</code></td>
+                  </tr>
+                  <tr>
+                    <td><code>LANGDIR("abc"@en)</code></td>
+                    <td><code>""</code></td>
+                  </tr>
+                  <tr>
+                    <td><code>LANGDIR("abc")</code></td>
+                    <td><code>""</code></td>
+                  </tr>
+                  <tr>
+                    <td><code>LANGDIR(1)</code></td>
+                    <td><code>""</code></td>
+                  </tr>
+                  <tr>
+                    <td><code>LANGDIR(&lt;http://example/&gt;)</code></td>
+                    <td><code>error</code></td>
+                  </tr>
+                </tbody>
+              </table>
+            </div>
           </section>
-
-
           <section id="func-datatype">
             <h5>DATATYPE</h5>
             <pre class="prototype nohighlight"> <span class="return"><span class="type IRI">iri</span></span>  <span class="operator">DATATYPE</span> (<span class="type"><span class="type">literal</span></span> <span class="name">literal</span>)