Just clarifying a rather small part of the big puzzle!

The argument is about whether support for WS-Addressing is all that is required in order to interact with services built on top of WS-RF. I believe this to be an oversimplification. Support for WS-Addressing is absolutely required. However, it's not enough.

It is enough, for a client to interact with a service that implements a WSRF specification. Note: I did not use the term build on top (this term might imply that WSRF implementations have to be provided by the infrastructure). The service simply implements one of the WS-* specifications (ie WSRF)! The client then uses messages exchanges as defined in that services description.

The implementation of the semantics of the ResourceProperties and Lifetime related messages have to be provided. If they are not provided, a developer will end up implementing them.

Absolutely, this is true of any web service specification, including WS-Transfer (no offence intended to any WS-* specification!) Abdeslem /////////