Standards in Service Interoperability and WSDL

Service Interoperability:

http://en.wikipedia.org/wiki/Web_Services_Interoperability

http://www.ws-i.org/

http://www.ibm.com/developerworks/webservices/library/ws-inter/index.html

Elements in the wsdl and description:

http://en.wikipedia.org/wiki/Web_Services_Description_Language