Adding conforms_to links

Author: cmungall

linkml_model/model/schema/types.yaml

@@ -121,14 +121,20 @@ types:
     comments:
       - in RDF serializations this MUST be expanded to a URI
       - in non-RDF serializations MAY be serialized as the compact representation
+    conforms_to: https://www.w3.org/TR/curie/
 
   uri:
     uri: xsd:anyURI
     base: URI
     repr: str
     description: a complete URI
+    comments:
+      - >-
+        in RDF serializations a slot with range of uri is treated as a literal or type xsd:anyURI unless it is an identifier or
+        a reference to an identifier, in which case it is translated directly to a node
     close_mappings:
       - schema:URL
+    conforms_to: https://www.ietf.org/rfc/rfc3987.txt
 
   ncname:
     uri: xsd:string