What is Web Service?

Web Service -

• is a client server application or application component for communication.
• method of communication between two devices over network.
• is a software system for interoperable machine to machine communication.
• is a collection of standards or protocols for exchanging information between two devices or application.

Web Service Component - 3 types

1. SOAP
2. WSDL
3. UDDI

SOAP - 

• Simple Object Access Protocol
• It is a XML-based protocol for accessing web services.
• It is a W3C recommendation for communication between applications.
• It is XML based, so it is platform independent and language independent. In other words, it can be used with Java, .Net or PHP language on any platform.

WSDL - 

1. Web Services Description Language.
2. WSDL is a xml document containing information about web services such as method name, method parameter and how to access it.
3. WSDL is a part of UDDI. It acts as a interface between web service applications.
4. WSDL is pronounced as wiz-dull.

UDDI -

• Universal Description, Discovery and Integration.
• It is a XML based framework for describing, discovering and integrating web services.
• It is a directory of web service interfaces described by WSDL, containing information about web services.