SOAP provides the envelope for sending Web Services messages over the Internet/Internet. It is part of the set of standards specified by the W3C. SOAP is an alternative to Representational State Transfer (REST) and JavaScript Object Notation (JSON).

The SOAP envelope contains two parts:

1. An optional header providing information on authentication, encoding of data, or how a recipient of a SOAP message should process the message.
2. The body that contains the message. These messages can be defined using the WSDL specification.

SOAP commonly uses HTTP, but other protocols such as Simple Mail Transfer Protocol (SMTP) may by used. SOAP can be used to exchange complete documents or to call a remote procedure.

NOTE: SOAP at one time stood for Simple Object Access Protocol. Starting with SOAP Version 1.2, the letters in the acronym have no particular meaning.

Also see how SOAP is used in the ebXML Message Service Specification (MSS).

Organization: W3C

More information: SOAP page on the W3C website

SOAP and Web Services

The following figure illustrates using SOAP for Web Services. Also see Web Services Explained.

 

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• https://www.w3schools.com/XML/xml_services.asp

Web services are web application components.

Web services can be published, found, and used on the Web.

This tutorial introduces WSDL, SOAP, RDF, and RSS.

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WSDL

• WSDL stands for Web Services Description Language
• WSDL is an XML-based language for describing Web services.
• WSDL is a W3C recommendation

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SOAP

• SOAP stands for Simple Object Access Protocol
• SOAP is an XML based protocol for accessing Web Services.
• SOAP is based on XML
• SOAP is a W3C recommendation

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RDF

• RDF stands for Resource Description Framework
• RDF is a framework for describing resources on the web
• RDF is written in XML
• RDF is a W3C Recommendation

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RSS

• RSS stands for Really Simple Syndication
• RSS allows you to syndicate your site content
• RSS defines an easy way to share and view headlines and content
• RSS files can be automatically updated
• RSS allows personalized views for different sites
• RSS is written in XML

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