Web Services Protocol Stack

• Set of computer networking protocols used to define, locate, implement, and make web services interact with each other.
• The common protocols and formats used are: HTTP, UDDI, WSDL, SOAP, XML, XML Schema
  
• Web services run on a transport protocol, like HTTP

Service Transport

• Transporting messages between network applications
• HTTP, SMTP, FTP, XMPP, BEEP

XML Messaging

• Encoding messages in XML
• SOAP, XML-RPC, REST

Service Description

• Describing the public interface to a specific web service
• WSDL

Service Discovery

• Registry that specifies the location and description of network web services
• Allows clients to discover what services are available
• UDDI