Overview of Web Services

• Why do we need Web Services?
• Service-Oriented Architecture Principles (SOA)
• HTTP and XML - what is the whole buzz about?
• Simple Object Access Protocol (SOAP)
• Web Service Description Language (WSDL)
• Universal Description, Discovery and Integration (UDDI)
• The WS-* profiles - what are these?
• REST

The XML Technology

The Simple Object Access Protocol

• Messaging Model
• Namespaces
• SOAP over HTTP
• The SOAP Envelope
• The Message Header
• The Message Body
• SOAP Faults
• Attachments

Web Services Description Language

• Web Services as Component-Based Software
• The Need for an IDL - history of Distributed Computing
• Web Services Description Language
• WSDL Information Model
• The Abstract Model -- Service Semantics
• Message Description
• Messaging Styles
• The Concrete Model -- Ports, Services, Locations
• Extending WSDL -- Bindings
• Service Description

Handling Binary Content

• The WS-I Attachments Profile
• Using base64Binary
• MIME Attachments