at risk for empty method-specific-id

Signed-off-by: Drummond Reed <[email protected]>

index.html

@@ -760,6 +760,15 @@ <h3>DID Syntax</h3>
 idchar             = ALPHA / DIGIT / "." / "-" / "_"
       </pre>
 
+      <p class="issue atrisk" data-number="34">
+      This ABNF does not currently permit an empty <code>method-specific-id</code>
+      string. Some DID methods have expressed an interest in providing
+      resolution of an DID with an empty <code>method-specific-id</code> string,
+      for example to enable discovery of a DID document describing a
+      <a>verifiable data registry</a> by resolving the DID method name alone.
+      </p>
+
+
       <p>
 For requirements on <a>DID methods</a> relating to the <a>DID</a> syntax, see
 Section <a href="#method-schemes"></a>.