Web Service Enumeration (WS-Enumeration) and Web Service Transfer (WS-Transfer), two new Web services messaging specifications, were released this week for public review by Microsoft, BEA Systems, Computer Associates, Sonic Software and Systinet.
WS-Enumeration describes a SOAP-based protocol that defines a Pull operation that allows a data source to produce a sequence of XML elements in a SOAP message. It brings enumeration capabilities to the WS-* (WS-Star) suite of specs.
WS-Transfer, meanwhile, enables state transfer over SOAP by defining how to invoke simple verbs like Get, Post, put and Delete. The specification defines two entities: resources, which are entities addressable by an endpoint reference; and resource factories, which are Web services that create a new resource from an XML representation.
It also defines two operations for sending and receiving the representation of a given resource and two operations for creating and deleting a resource and its corresponding representation, the companies said in a release.