regrep-ws-profile: Clarafication required about id attribute rules

[andreas.veithen@gfi.be]

Dear all,

The "ebXML Registry profile for Web Services" specification (as of version 
1.0 Draft 3) contains rules for the id attribute values of different 
registry objects mapped from a WSDL. For example, section 4.1.1 specifies 
that

"The id attribute value of the rim:Service MUST have as prefix the 
targetNamespace for the wsdl:service element, followed by a suffix of 
“:service:<service name>” where <service name> MUST be the value of the 
name attribute of the wsdl:service element."

I think that this statement is inconsistent and/or needs clarification. 
The reason is that the id in the registry must be a URN, whereas the 
targetNamespace is a URI. Since the concept of URI is a superset of the 
concept of URN, it is inconsistent to require constructing a URN by 
prefixing it with a given URI, unless a prescription is given to map URIs 
to URNs. For example, "http://www.acme.org/service"; is a valid value for 
targetNamespace. Naively applying the above rule would give something like 
"http://www.acme.org/service:service:MyService";, which of course is not a 
valid URN. Note that in this case, the OMAR implementation produces an id 
such as "urn:http:__www_acme_org_service:service:MyService", i.e. OMAR 
actually has some rules to map from URIs to URNs (which by the way don't 
guarantee uniqueness). I think that the regrep-ws-profile specs should 
clearly specify the mapping to be used or alternatively make reference to 
an existing specification defining this type of mapping.

Best regards,

Andreas Veithen

PS: Could you also consider adding to regrep-rim a normative reference 
defining the concept of URN (RFC2141?)?




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