Web services are Internet applications that expose an interface that is described, accessed, and published using XML. JDeveloper comes with an integrated Oracle XML Developer Kit that contains the basic building blocks for reading, manipulating, transforming, and viewing XML documents, enabling you to integrate SOAP (Simplified Object Access Protocol), WSDL (Web Service Definition Language), and UDDI (Universal Description, Discovery, and Integration) Web services in any application.

JDeveloper enables you to create Web services from UML models, expose Java and database applications as Web services, and rapidly build Web service clients. Design-time wizards guide you through the creation of Web services, which automatically generates WSDL that describes the Web service. Java Web service client stubs and Web service server skeletons can be declaratively generated from the WSDL files. Web services created in JDeveloper can be deployed to Oracle9iAS SOAP and Apache SOAP 2.x servers with a single mouse click.