Set the aria attribute directly in SVG preview

previews/vcdm/vocabulary.html

@@ -9,21 +9,14 @@
           const p = sotd.getElementsByTagName('p')[0];
           sotd.removeChild(p);
       }
-
-      // Note: The vocabulary URL must be adapted for the given environment!!!!
+    // Note: The vocabulary URL must be adapted for the given environment!!!!
       function massageSVGLinks(utils, content, url) {
         const retval = content
           .replace(/xlink:href/g, 'href')
           .replace(/href="https:\/\/w3.org\/2018\/credentials#/g, 'href="#');
         return retval;
       }
 
-      // Add the ARIA attribute to the svg element.
-      function add_svg_aria() {
-        const svg = document.getElementsByTagName('svg')[0];
-        svg.setAttribute("aria-details","#vocabulary-diagram-alt");
-      }
-
     </script>
     <script class="remove">
       var respecConfig = {
@@ -69,7 +62,7 @@
           {uri: "vocabulary.ttl", label: "Turtle"},
           {uri: "vocabulary.jsonld", label: "JSON-LD"}
         ],
-        postProcess : [remove_status_remark, add_svg_aria],
+        postProcess : [remove_status_remark],
         inlineCSS: true,
         doRDFa: false,
         noIDLIn: true,
@@ -174,14 +167,14 @@ <h2>Specification of terms</h2>
           The diagram is exported into SVG, and then the following editorial changes should be done (using any text editor):
           - The "width" and "height" attributes in the top level <svg> element must be removed (to make the diagram rescale if 
             viewed directly)
+          - add the aria-details="#vocabulary-diagram-alt" attribute to the top level svg element
 
           The exported SVG can also be viewed and edited inkscape. (The reason draw.io is used, instead of using
           exclusively inkscape, is because the connecting line feature of inkscape is buggy.)
         -->
         <div data-include="vocabulary.svg" data-include-replace="true" data-oninclude="massageSVGLinks"></div>
         <figcaption>Overview diagram of the vocabulary (without the deprecated items).<br>
-          A separate, stand-alone <a href="vocabulary.svg" target="_blank">SVG version</a> of the diagram, 
-          as well as a <a href="#vocabulary-diagram-alt">textual description</a>,
+          A separate, stand-alone <a href="vocabulary.svg" target="_blank">SVG version</a> of the diagram, as well as a <a href="#vocabulary-diagram-alt">textual description</a>,
           are also available.
         </figcaption>
       </figure>