A excellent source of SOA and Web Services papers. I strongly recommend.
Patricia Seybold Group – Home Page: “Web Services and SOA
Web Services and Service-Oriented Architecture
Web Services are only one example of a much larger architectural strategy: using a services-oriented approach to design and to integrate applications. We cover both Web Services and the broader topic of SOA. Savvy IT architects have been using SOA as a design approach for over two decades. We have been chronicling and promoting SOA since the late 1980′s, when the same principles were referred to as ‘distributed object computing.’
A service is a ‘worker’ employed to achieve a specific end goal for a ‘requestor.’ The end goal is small in scope, such as retrieving information, or large in scope, such as executing a business process. The services the worker performs are made visible and accessible to other services and applications using a services API. Web Services use self-describing APIs written in human and machine-readable XML.
We offer a services discovery and classification methodology. Our methodology starts from your customers–by identifying your customers’ key scenarios and discovering and classifying the services required to support those scenarios.”