Web Services
Web services provide a standard for interoperating between different software applications running on a variety of platforms and/or frameworks. A Web service is a software system designed to support interoperable machine-to-machine interaction over a network. The interface is specified in the machine-processable Web Service Definition Service (WSDL) format. Other systems interact with the Web service as prescribed by its description using Simple Object Access Protocol (SOAP) messages, typically conveyed using HTTP with an XML serialization in conjunction with other Web-related standards.
The UDDI (Universal Description, Discovery and Integration) has a central role for Web services. UDDI is a "meta service" for locating Web services by enabling robust queries against rich metadata.
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