Tuesday, December 19, 2017
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XML Web Services

XML Web services are the fundamental building blocks in the move to distributed computing on the Internet. Open standards and the thrust on communication and collaboration among people and applications have created an environment where XML Web services are becoming the platform for application integration. Applications are constructed using multiple XML Web services from various sources that work together regardless of where they reside or how they were implemented.

XML Web Services expose useful functionality to Web users through a standard Web protocol. In most cases, the protocol used is SOAP. XML Web services provide a way to describe their interfaces in enough detail to allow a user to build a client application to talk to them. This description is usually provided in an XML document called a Web Services Description Language (WSDL) document. XML Web services are registered so that potential users can find them easily. This is done with Universal Discovery Description and Integration (UDDI). And XML (Extensible Markup Language) is an industry-standard, system-independent way of representing data.

Like HTML (HyperText Markup Language), XML encloses data in tags, but there are significant differences between the two markup languages. As an example, XML tags relate to the meaning of the enclosed text, whereas HTML tags specify how to display the enclosed text. The chief advantage of the XML Web services architecture is that it allows programs written in different languages on different platforms to communicate with each other in a standards-based way. XML Web services are built on XML, SOAP, WSDL and UDDI specifications. These constitute a set of baseline specifications that provide the foundation for application integration and aggregation.

XML Web services can be used for many purposes. The first XML Web services tended to be information sources that you could easily incorporate into applications—stock quotes, weather forecasts, sports scores etc. It's easy to imagine a whole class of applications that could be built to analyze and aggregate the information you care about and present it to you in a variety of ways; for example, you might have a Microsoft Excel spreadsheet that summarizes your whole financial picture—stocks, bank accounts, loans, etc. If this information is available through XML Web services, Excel can update it continuously. Some of this information will be free and some might require a subscription to the service. Most of this information is available now on the Web, but XML Web services will make programmatic access to it easier and more reliable.

Exposing existing applications as XML Web services will allow users to build new, more powerful applications that use XML Web services as building blocks. For example, a user might develop a purchasing application to automatically obtain price information from a variety of vendors, allow the user to select a vendor, submit the order and then track the shipment until it is received. The vendor application, in addition to exposing its services on the Web, might in turn use XML Web services to check the customer's credit, charge the customer's account and set up the shipment with a shipping company.

What Java Development India Offer?

Java Development India offers XML development, XML consulting and XML related solutions from our offshore software development outsourcing centre at Kochi, Kerala in India.


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