diff --git a/spec/index.html b/spec/index.html
index d712d63..dcf8995 100644
--- a/spec/index.html
+++ b/spec/index.html
@@ -359,6 +359,9 @@ <h3>Changes</h3>
               <li><time>2021-03-01</time>: Add <a href="#the-featurecaption-element"><code>featurecaption</code></a> element.</li>
               <li><time>2021-03-15</time>: Add required text for <a href="#dfn-text-mapml"><code>text/mapml</code></a> MIME media type registration with IANA.</li>
               <li><time>2021-06-15</time>: Remove the <code>line</code> and <code>marker</code> values of the <code>shape</code> attribute.</li>
+              <li><time>2021-09-08</time>: Remove <code>HTMLExtentControlsCollection</code> attribute, per <a href="https://github.com/Maps4HTML/MapML/issues/212">#212</a></li>
+              <li><time>2021-09-08</time>: Remove undefined and unresolved <code>LinkStyle</code> interface reference, per <a href="https://github.com/Maps4HTML/MapML/issues/212">#212</a></li>
+              <li><time>2021-09-08</time>: Remove <code>legendLinks</code> attribute and interface definition and reference, per <a href="https://github.com/Maps4HTML/MapML/issues/212">#212</a></li>
             </ol>
           </details>
         </section>
@@ -763,23 +766,9 @@ <h4>The <code>&lt;<dfn id="the-layer-element">layer</dfn>&gt;</code> element</h4
                      attribute boolean <a href="#attr-layer-checked">checked</a>;
             readonly attribute boolean <a href="#attr-layer-disabled">disabled</a>;
                      attribute boolean <a href="#attr-layer-hidden">hidden</a>;
-            readonly attribute <a href="#legendlink">LegendLink[]</a> legendLinks;
                      attribute DOMString <a href="#attr-layer-referrerpolicy">referrerPolicy</a>;
                      attribute DOMString? <a href="#attr-layer-crossorigin">crossOrigin</a>;
           };
-            
-          [Exposed=Window]
-          interface <dfn id="legendlink">LegendLink</dfn> {
-            [HTMLConstructor] constructor();
-            
-            readonly attribute DOMString type;
-            readonly attribute DOMString rel;
-            readonly attribute DOMString href;
-            readonly attribute DOMString title;
-            readonly attribute DOMString lang;
-            readonly attribute DOMString hreflang;
-            readonly attribute DOMString sizes;
-          };
           </pre>
         </dd>
         </dl>
@@ -1819,7 +1808,6 @@ <h5>The <code>&lt;<dfn id="the-link-element">link</dfn>&gt;</code> element</h5>
               attribute DOMString type;
               attribute DOMString title;
             };
-            HTMLLinkElement implements LinkStyle;
           </pre>
           </dd>
         </dl>
@@ -2049,7 +2037,6 @@ <h5>The <code>&lt;<dfn id="the-extent-element">extent</dfn>&gt;</code> element</
               [HTMLConstructor] constructor();
               
               attribute DOMString units;
-              readonly attribute HTMLExtentControlsCollection elements;
               readonly attribute long length;
               getter Element (unsigned long index);
               getter (RadioNodeList or Element) (DOMString name);