For example, sites A and B may agree on time-out values for message transmission and a maximum time by which compensation may occur. 2.6 Manageability Web service infrastructure needs to support very basic management interfaces. We view each site having full autonomy over its infrastructure and management. We feel that on a peer wise basis, each site should provide basic reporting and recovery for the various protocols. For example, a site A that supports conversations should provide an interface that another site B can use to query for active conversations and force rollback.
Similar functions apply for reliable messaging, etc.
2.7 Intermediaries One of the fundamental enhancements that web services will provide is support for Intermediaries. A site B specifies a WSFL sub-graph that defines the structure of the intermediaries. When site A resolves a service to site B, the WSL graph states that invoking the service on B occurs by invoking the service on an entry node in the flow, which will result in the service eventually occurring at B after the intermediaries process the message. The WSFL also states the flow through intermediaries on messages sent back to A. Finally, the flow definition specifies which data must by sealed for delivery to which intermediaries in the chain. 2.8 Context Awareness Writers often refer to intelligent web services.