Clarke Wrote:Web services are mainly are of two types:

1. SOAP web services - SOAP (Simple Object Access Protocol) messages, typically conveyed using HTTP with an XML serialization in conjunction with other Web-related standards. Such systems often contain a machine-readable description of the operations offered by the service, written in the Web Services Description Language (WSDL), an XML language for defining interfaces syntactically.

2. REST-compliant Web services- REST-compliant Web services, in which the primary purpose of the service is to manipulate Representations of Web resources using a uniform set of stateless operations. Restful web services, often better integrated with HTTP than SOAP-based services are, do not require XML messages or WSDL service–API definitions.