SOA: XML, WSDL, SOAP, Web Service

What is XML?

Extensible Markup Language (XML) is a markup language that defines a set of rules for encoding documents in a format that is both human-readable and machine-readable. It is defined in the XML 1.0 Specification produced by the W3C, and several other related specifications

As of 2009, hundreds of XML-based languages have been developed, click on the link to see the number of XML based language http://en.wikipedia.org/wiki/List_of_XML_markup_languages

Read more about XML and understand it before continuing to read this article.

What is WSDL?

WSDL (Web Services Description Language) is one of the XML-based language for describing Web services and how to access them. It specifies the location of the service and the operations (or methods) the service exposes.

• WSDL stands for Web Services Description Language
• WSDL is written in XML
• WSDL is an XML document
• WSDL is used to describe Web services
• WSDL is also used to locate Web services
• WSDL is a W3C recommendation

Now we know what WSDL is and we have to understand SOAP.

SOA, Web Service, SOAP and WSDL

“SOAP-oriented architecture”…!

Legacy Architecture