Why needed SOAP? XML was there to exchange between different application

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SOAP is protocol which uses XML and communicate between application, reside in different server and written in any language, using HTTP protocol.
But why different application cant exchange XML ( not language or server dependent) for data transaction? Why this SOAP protocol was needed at all?

Posted 22-Apr-15 0:29am

Member 4228925

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Abhinav S · Accepted Answer · 2015-04-22T00:40:00

Solution 1

SOAP is the standard i.e. set of contracts that all communicating parties understand. Internally, SOAP uses XML.
Hope that clarifies the difference between the two.

Posted 22-Apr-15 0:40am

Abhinav S

Comments

TheRealSteveJudge 22-Apr-15 6:48am

Good explanation. 5*

Member 4228925 6-May-15 14:02pm

Thank you

Raul Iloc · Accepted Answer · 2015-04-22T00:48:00

1)The old applications communicated using Remote Procedure Calls (RPC) between objects like DCOM and CORBA, but HTTP was not designed for this. RPC represents a compatibility and security problem; firewalls and proxy servers will normally block this kind of traffic.

A better way to communicate between applications is over HTTP, because HTTP is supported by all Internet browsers and servers. SOAP was created to accomplish this, and SOAP provides a way to communicate between applications running on different operating systems, with different technologies and programming languages.

2)SOAP is a specialization of XML, as it has a schema, such as http://www.xmlsoap.org/soap/envelope/, whereas XML is more general.

3)You can find details about SOAP here: http://www.w3.org/TR/soap/[^]