The web is an information space that contains documents and web resources accessed through the Internet. The implementation of the web contains a browser and HTTP server using Internet protocols. It includes markup languages, programming interfaces and languages, and standards for document identification and visualization. Web service is the latest trending topic in web technology. Web service uses resources available over networks using standard interfaces running on different Operating systems and written using different languages. Web services are application components using open protocols and are self-contained and self-describing. Web services use XML to code and decode data and SOAP to transport it. The term describes a standardized way of integrating Web-based applications using the XML, SOAP, WSDL, and UDDI open standards over an Internet protocol backbone. XML is used to tag the data, SOAP is used to transfer the data, WSDL is used for describing the services available, and UDDI is used for listing what services are available. The Semantic Web is another extension of web technology that makes the web more meaningful and Internet data machine-readable. Resource Description Framework (RDF) and Web Ontology Language (OWL) are the primary technology to enable the semantics of the data by the formal metadata representations over the web. These technologies work on the common exchange protocols and data formats to integrate the heterogeneous applications running on diversified platforms and languages.