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14 The XML Files: Development of XML/XSL Applications Using WebSphere Studio
format to define an endpoint. Related concrete endpoints are combined into
abstract endpoints (services). WSDL is extensible to allow description of
endpoints and their messages regardless of what message formats or
network protocols are used to communicate, however, the only bindings
described in this document describe how to use WSDL in conjunction with
SOAP 1.1, HTTP GET/POST, and MIME.”
Figure 1-2 Interaction of Web services
1.9 XML, W3C, and IBM
The World Wide Web Consortium (W3C) creates Web standards for the Internet.
It formed a Web service activity group in January 2002. The goal of the Web
service activity is to develop technologies in order to bring Web services to their
full potential. It consists of three working groups: Web Services Architecture
Working Group, XML Protocol Working Group, Web Services Description
Working Group.
Web Service
UDDI Registry
Service
Broker
UDDI Registry
Another
Service
Broker
publish with
WSDL
find thru
WSDL
first bind, then invoke
Application by
Client
SOAP
Service
Provider
Service
Requester