Added the proposed sentence for verification method type

Co-authored-by: Ted Thibodeau Jr <[email protected]>

index.html

@@ -1178,15 +1178,20 @@ <h2>Verification Methods</h2>
                 <dd>
                   <p>
 The value of the `id` property for a [=verification method=] MUST be a
-[=string=] that conforms to the conforms to the [[URL]] syntax.
+[=string=] that conforms to the [[URL]] syntax.
                   </p>
                 </dd>
                 <dt>type</dt>
                 <dd>
-The value of the `type` property MUST be a [=string=] that references exactly
-one [=verification method=] type. In order to maximize global
-interoperability, the [=verification method=] type SHOULD be registered in
-the Data Integrity Specification Registries [TBD -- DIS-REGISTRIES].
+The value of the `type` property MUST be a [=string=] that either conforms to the
+[[URL]] syntax or maps (through interpretation of the `@context` property) to a [[URL]],
+and that references exactly one [=verification method=] type. 
+This specification defines two
+[=verification method=] types (<a href="#multikey">`Multikey`</a> and
+<a href="#jsonwebkey">`JsonWebKey`</a>); others may be defined by the community.
+To maximize global interoperability, such community-defined [=verification method=]
+types SHOULD be registered in the Data Integrity Specification Registries
+[TBD -- DIS-REGISTRIES]. 
                 </dd>
                 <dt><span id="defn-controller">controller</span></dt>
                 <dd>