Web services, WSDL, SOAP and UDDI 1.0

Introduction Back-end systems

Web Services “Web services wrap, presenting to the network a standard way of interfacing with back-end software systems, such as DBMS, .NET, J2EE, or CORBA, objects,…” – Understanding Web Services, Newcomer, 2003.

SOAP Simple Object Access Protocol A collection of XML-based technologies Defines an envelope for Web services communication – mappable to HTTP and other transports – and provides a serialization format for transporting XML documents over network

UDDI Universal Discovery, Description and Integration A web services registry and discovery mechanism, is used for storing and categorizing business information and for retrieving pointers to Web services interfaces

WSDL Web Services Description Language XML-based technology, defines Web services interfaces, data and message types, interaction patterns, and protocol mappings Describes The name of the service The location the service can be accessed at The methods available for invocation The input and output parameters for each method