modified in response to comments

Signed-off-by: Brent <[email protected]>

Author: brentzundel

index.html

@@ -2146,6 +2146,9 @@ <h3>Data Schemas</h3>
 definitions or lock them to specific versions of the vocabulary. Authors of VCs
 can include a static version of their vocabulary via credentialSchema that is
 locked to some content integrity protection mechanism.
+The <code>credentialSchema</code> <a>property</a> also makes it possible to
+perform syntactic checking on the credential and use verification mechanisms
+such as JSON Schema validation.
         </p>
 
         <pre class="example nohighlight" title="Usage of the credentialSchema property to perform JSON schema validation">