Technology does not like to stand still. It keeps evolving. Nowadays, SOAP web services are not so frequently used compared to their newer REST-ful variant.
Over time, the XML file format became harder and harder to process. Initially, the simple XML specification went through many improvements and became more complex. The addition of XML Namespaces, XSLT, XQuery, and a couple of other specifications made XML processing much more demanding. In the meantime, much simpler JavaScript Object Notation (JSON) became the most popular format for exchanging structured data.
The new REST architecture for implementing web services is not as standardized as XML SOAP web services. Representation State Transfer (REST), fully utilizes the underlying HTTP protocol and makes use of its different request methods and response codes. On the other hand, the SOAP specification...