Correct some references to be informative.

index.html

@@ -1131,7 +1131,7 @@ <h2>Resource Integrity</h2>
         <p>
 JSON-LD context authors are expected to add `digestMultibase` to contexts that
 will be used in documents that refer to other resources and to include an
-associated cryptographic digest. For example, the [[[VC-DATA-MODEL-2.0]]] base
+associated cryptographic digest. For example, the [[[?VC-DATA-MODEL-2.0]]] base
 context (`https://www.w3.org/ns/credentials/v2`) includes the
 `digestMultibase` property.
         </p>
@@ -1684,7 +1684,7 @@ <h2>Cryptographic Suites</h2>
 instantiation algorithm">data integrity cryptographic suite instantiation
 algorithm</dfn> that accepts a set of options ([=map=] |options|) and returns a
 [=cryptosuite instance=] ([=struct=] |cryptosuite|). This algorithm SHOULD be
-listed in the [[[VC-EXTENSIONS]]] document. A <dfn class="export"
+listed in the [[[?VC-EXTENSIONS]]] document. A <dfn class="export"
 data-local-lt="cryptosuite instance">data integrity cryptographic suite
 instance</dfn> [=struct=] has the following [=struct/items=].
           <dl data-dfn-for="cryptosuite instance">
@@ -1741,7 +1741,7 @@ <h2>Cryptographic Suites</h2>
       <p>
 A [=cryptosuite instance=] is instantiated using a [=cryptosuite instantiation
 algorithm=] and is made available to algorithms in an implementation-specific
-manner. Implementations MAY use the [[[VC-EXTENSIONS]]] document to discover
+manner. Implementations MAY use the [[[?VC-EXTENSIONS]]] document to discover
 known [=cryptosuite instantiation algorithms=].
       </p>