Web services

Web services:A web service is any piece of software that makes itself available over the internet anduses a standardized XML messaging system. XML is used to encode allcommunications to a web service. For example, a client invokes a web service bysending an XML message, then waits for a corresponding XML response.XML Web Services« Previous Next Chapter »Web services are web application components.Web services can be published, found, and used on the Web.This tutorial introduces WSDL, SOAP, RDF, and RSS.WSDL  WSDL stands for Web Services Description Language  WSDL is an XML-based language for describing Web services.  WSDL is a W3C recommendationSOAP  SOAP stands for Simple Object Access Protocol  SOAP is an XML based protocol for accessing Web Services.  SOAP is based on XML

 SOAP is a W3C recommendationRDF  RDF stands for Resource Description Framework  RDF is a framework for describing resources on the web  RDF is written in XML  RDF is a W3C RecommendationRSS  RSS stands for Really Simple Syndication  RSS allows you to syndicate your site content  RSS defines an easy way to share and view headlines and content  RSS files can be automatically updated  RSS allows personalized views for different sites  RSS is written in XML XML  XML stands for EXtensible Markup Language  XML is a markup language much like HTML  XML was designed to store and transport data  XML was designed to be self-descriptive  XML is a W3C RecommendationThe XML Schema definition language (XSD) enables you to define the structure and datatypes for XML documents. An XML Schema defines the elements, attributes, and data typesthat conform to the World Wide Web Consortium (W3C)XML Schema Part 1: StructuresRecommendation for the XML Schema DefinitionLanguage.