Introduction to XML Web Services

Web services take web applications to the next level. By using Web services, your application can publish its function or message to the rest of the world. With web services, your accounting department’s Win 2k server’s billing system can connect with your IT supplier’s UNIX server.Web services can offer application-components like: currency conversion, weather reports, or even language translation as services. There are things applications need very often. So why make these over and over again?

Web servicesĀ are units of programmable application logic located on web servers that can be accessed remotely using standard internet protocols and data formats such as XML, HTTP and SOAP.

Web services are platform-independent and language-independent, since they use standard XML languages. This means that my client program can be programmed in C++ and running under Windows, while the Web Service is programmed in Java and running under Linux.

Web Services are published, found, and used through the Web. The basic Web services platform is XML + HTTP.

WSstandards

Web services platform elements are:

  • SOAP (Simple Object Access Protocol)
  • UDDI (Universal Description, Discovery and Integration)
  • WSDL (Web Services Description Language)
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