Web Services Specifications. Today, Microsoft released for preview the first set of specifications in the Global XML Web Services Architecture on routing, referral, security, and licensing that build on the baseline XML, SOAP, WSDL, and UDDI specifications. — MSDN
These appear to be jointly developed with IBM. I don't know whether it will be submitted to a standards organisation in the future, though IBM being in the picture might suggest that is the case.
I had a look at the specs: WS-Routing and WS-Referer provides for the basics of workflow messaging – who is responsible for what part of a SOAP message, and then you can forward it to the next person – very interesting to me because my company provides workflow solutions. [PHP Everywhere]