SOAP Overview (Based on SOAP 1.2)


  • What is and is not SOAP?
  • SOAP Message Structure
  • Fault message 
  • SOAP Message Exchange 
  • SOAP with Attachments

What is and is Not SOAP?

  • What is SOAP? W3C Definition 
  • SOAP is a lightweight protocol intended for exchanging structured information in a decentralized, distributed environment 
  • SOAP uses XML technologies to define an extensible messaging framework providing a message construct that can be exchanged over a variety of underlying protocols 
  • The framework has been designed to be independent of any particular programming model and other implementation specific semantics

What is SOAP? 

  • Simple Object Access Protocol 
  • Wire protocol similar to 
    • IIOP for CORBA 
    • JRMP for RMI 
  • XML is used for data encoding 
    • “text” based protocol vs. “binary” protocol 
  • Supports XML-based RPC (Remote Procedure Call) 
    • To ease the migration of existing RPC distribution schemes to SOAP based system

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