What is a Web Service?

What is the most popular technology now? Is it Java, is. Net, or what? I think it should be the Web service technology.

Web Service provides a simple, flexible programming model, and uses the current standard on the Internet to avoid the problems and disputes that developers face when choosing different platforms, operating systems, and programming languages. Through the packaging of Web Service, system development and integration is no longer to choose which program design model, program language, operating system and platform.

Basically, the Web service wraps the components and services through HTTP and XML into a programmable URI (Universal Resource Identifier) address, which is packaged by the Web service, Creating and using an object in programming is as easy as browsing a URL. The core of the Web Service is soap (simple Object Access Protocol), an easy communication protocol designed to "programming the Web".

Web Service provides a technology that enables access to application components through standard Internet communication protocols. Developers can find descriptions of relevant Web services from Web sites on the Internet using the instructions, applications or users that use the Web service services accept or pass data that is expressed in XML. Object invocation or access is done in an open Internet communication protocol.

So the web Service is:

A common standard can be used to describe data and is neutral to platform and language XML.

A common communication protocol, and is neutral to platform and language soap.

A common contract language (contract language) is used to describe Web service, such as SDL (Service Description language).

The Web Service is Microsoft. NET strategy, Microsoft's goal is to build a Cross-platform application based on the Microsoft platform-we said: Web service in the most common, the simplest way (neutral Internet standards, neutral XML documents) processing, transmission of information, as a user of information, You can use Web service regardless of platform, as long as you can connect to the Internet, as long as you can identify XML (in fact, text in a special format). Do: Any site, any time, any Internet-accessible (internetable) equipment can use the services provided by the Web service.