representations: Consolidate duplicative inverse normative statements…

… about content type, #384

index.html

@@ -2340,10 +2340,10 @@ <h1>Core Representations</h1>
 
     <p>
 Producers MUST indicate which representation of a document has been used via a
-media type in the document's metadata. Consumers MUST determine which
-representation a document is in via the <code>content-type</code> DID resolver
-metadata field. (See <a href="#did-resolution"></a>). Consumers MUST NOT
-determine the representation of a document through its content alone.
+media type in the document's metadata. Consumers MUST determine the
+representation of a <a>DID document</a> via the <code>content-type</code> DID
+resolver metadata field (see <a href="#did-resolution"></a>), <em>not</em>
+through the content of the <a>DID document</a> alone.
     </p>
 
     <p class="issue" data-number="203">