It is useful to include non-authoritative statements in NML messages. For example:

"I think that your Port A is the source of my Link A"

Currently, this statement is written as:

<nml:Link id="urn:ogf:network:provider.com:2012:PortA">
  <nml:Relation type="isSource">
    <nml:Port idRef="urn:ogf:network:client.net:2012:LinkA"/>
  </nml:Relation>
</nml:Link>

There is currently no means to convey that the client is not authoritative for urn:ogf:network:provider.com:2012:PortA.

The following 2 proposals can be used to signify authority or non-authority.

Proposal 1)
XML: The client is authoritative for every element with an "id" attribute.
RDF: The client is authoritative for every element mentioned as a subject in a triplet

Proposal 2)
Add a new "authoritative" property to the NML Network Object.

XML:
 <nml:Port idRef="urn:ogf:network:client.net:2012:PortA"/>
   <nml:authoritative />
 </nml:Port>

RDF:
 urn:ogf:network:client.net:2012:PortA  nml:authoritative  True .