Chapter 4. WebServices

Table of Contents

With Web Services, you can also realize distributed applications additionally to CORBA, DCOM or EJB. Web services define another standard for letting different software components work together over a network. Special attention was put on platform- independence, which means that web services can work together spanning different manufactures and systems. From the start, the Internet was considered as the connecting network with the goal to connect and integrate applications over the Internet.

Also keep in mind that Microsofts .NET Framework uses web services as integral technology for its distributed infrastructure. It uses web services instead of DCOM.

4.1. Web services messages

Web services messages actually always use the SOAP standard, which represents an XML application. Requests to a web service are thus expressed in XML. The answers returned by the web service are also delivered in XML. Later I will explain, how to look at such SOAP message for error tracing.