Add "content-type" and "content-id" DID URL matrix parameters.

index.html

@@ -764,6 +764,28 @@ <h2>
         </thead>
 
         <tbody>
+          <tr>
+            <td>
+<code>content-type</code>
+            </td>
+            <td>
+Specifies a type of content object (other than a DID Document) to be returned
+from the target DID registry. Note: This parameter may not be supported by
+all DID methods.
+            </td>
+          </tr>
+
+          <tr>
+            <td>
+<code>content-id</code>
+            </td>
+            <td>
+Specifies the method-specific identifier of a content object (other than a DID
+Document) to be returned from the target DID registry. Note: This parameter
+may not be supported by all DID methods.
+            </td>
+          </tr>
+
         </tbody>
       </table>