Web Service - is a program system identified by the URI string which public interfaces and links are defined and described by the XML language. The description of this program system may be found using other program systems which may interact with it according to such description through XML-based messages transmitted via Internet protocols.
Advantages of Web Services:
Web services ensure the interaction of program systems irrespective of the platforms. Web services are based on open standards and protocols. Thanks to XML, web services can be developed and debugged with ease. The use of HTTP Internet protocol provides for interaction of program system through the network firewall.
The web service module serves to facilitate the creation and integration with the existing web services. The module is mainly used for developing integrations with operating applications both inside the company and with external already operating web services.