Web service

The term Web service (WS) is either:We can identify two major classes of Web services:A web service is a software system designed to support interoperable machine-to-machine interaction over a network. It has an interface described in a machine-processable format (specifically WSDL). Other systems interact with the web service in a manner prescribed by its description using SOAP-messages, typically conveyed using HTTP with an XML serialization in conjunction with other web-related standards. The term Web service (WS) is either: In a Web service, the Web technology such as HTTP—originally designed for human-to-machine communication— for transferring machine-readable file formats such as XML and JSON. In practice, a Web service commonly provides an object-oriented Web-based interface to a database server, utilized for example by another Web server, or by a mobile app, that provides a user interface to the end user. Many organizations that provide data in formatted HTML pages will also provide that data on their server as XML or JSON, often through a Web service to allow syndication, for example, Wikipedia's Export. Another application offered to the end user may be a mashup, where a Web server consumes several Web services at different machines and compiles the content into one user interface. Asynchronous JavaScript And XML (AJAX) is a dominant technology for Web services. Developing from the combination of HTTP servers, JavaScript clients and Plain Old XML (as distinct from SOAP and W3C Web Services), now it is frequently used with JSON as well as, or instead of, XML. Representational State Transfer (REST) is an architecture for well-behaved Web services that can function at Internet scale.