FW: Reference Parameters vs. complete EPRs

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FW: Reference Parameters vs. complete EPRs

Jonathan Marsh

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From: [hidden email] [mailto:[hidden email]] On Behalf Of Jonathan Marsh
Sent: Tuesday, April 11, 2006 4:43 PM
To: [hidden email]
Subject: Reference Parameters vs. complete EPRs


Section 4.3 ReferenceParameters

The current mechanism for embedding EPR information in a WSDL endpoint/port misses an opportunity to provide some useful benefits, which would be regained by embedding the whole EPR rather than just the ReferenceParameters element.


  1. Address information can appear in WSDL in a variety of ways.  In WSDL 1.1 it can appear in the wsoap11:element attribute, or in the wsoap12:address element if the WSDL 1.1 Binding Extension for SOAP 1.2 submission [1] (acknowledged by W3C yesterday) is used.  In WSDL 2.0 it can appear in the wsdl:endpoint/@address attribute.  Allowing wsa:Address to extend the endpoint/port provides a consistent way to serialize addresses regardless of the WSDL and SOAP version in use.
  2. Deconstructing an EPR to serialize it into WSDL requires special serialization code.  Instead of having a single codepath for serializing an EPR, we need a WSDL-specific way to serialize just the ReferenceParameters.
  3. Multiple serializations become increasingly painful as EPR extensions are developed, which would each have to be serializable in two flavors – EPR extensions, and endpoint/port extensions.
  4. Every EPR extension would also have to be defined both as an EPR extension and as a WSDL extension, making the development of EPR extensions more complex.
  5. We currently use 2004/08 EPRs as WSDL extensions without deconstructing them, and we’d like a consistent model between the submitted and standardized models.


We therefore request that section 4.3 specify that a whole EPR can be embedded in an endpoint/port.  If both an EPR and one of the *:address mechanisms are present, the address values MUST match.


[1] http://www.w3.org/Submission/wsdl11soap12/



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