WEB SERVICES

Web services are self-contained business functions that operate over the Internet. Web services are automated information services that are conducted over the Internet, using standardized technologies and formats/protocols that simplify the exchange and integration of large amounts of data over the Internet. They make it easier to conduct work across organizations regardless of the types of operating systems, hardware/software, programming languages, and databases that are being used. Web Services is the umbrella term of group of loosely related Web-based resources and components that may be used by other Web applications over HTTP. Those resources could include anything from phone directory data to weather data to sports results. Web services the a term used to describe a standardized way of integrating multiple online web protocols such as XML, SHTML, PERL, CGI and creating a user friendly experience to your targeted audience. Automated resources accessed via the Internet. Web services are software-powered resources or functional components whose capabilities can be accessed at an internet URI. Standards-based web services use XML to interact with each other, which allows them to link up on demand using loose coupling. The term "Web Services" can be confusing. It is, unfortunately, often used in many different ways. Compounding this confusion is term "services" that has a different meaning than the term "Web Services." On this site, the term Web Services refers to the technologies that allow for making connections. Services are what you connect together using Web Services. A service is the endpoint of a connection. Also, a service has some type of underlying computer system that supports the connection offered. The combinations of services - internal and external to an organization - make up a service-oriented architecture. An interface for a service oriented architecture (SOA), in which Web-based applications dynamically interact with other Web applications using open standards that include XML running over HTTP, UDDI and

SOAP. Such applications typically run behind the scenes, one program "talking to" another (server to server). Microsoft's .NET and Sun's Java System (J2EE) are the major development platforms that natively support these standards. Web services have been initially successful in private environments where large enterprises need to exchange data with their divisions and subsidiaries or with partners and clients. In such controlled situations, agreement on the data being passed between Web service components is more easily obtained. In addition, since Web services use open standards, vendors can supply customers with client side software to add to their applications no matter what the platform.

Web services over the public Internet are expected to materialize slowly. Using discovery systems such as UDDI, the goal is to register a service on the Internet, allow an application to search for and find the service and then to seamlessly exchange data with it. If the service is fee based, payment processing could be included. Before global Web services can be put into operation, there must be industry agreement on the functions each service component must provide. A web service is just that. A service that is provided via the web. It is not uncommon to see a web site referred to as a web service. So, like many definitions, the important thing here is context. It's usually a bad idea to define a term using the term itself (for example, "A web service is a service that executes over the web"), because it leaves the reader feeling a bit foggy. Maybe it's better to say that a web service is a program triggered to execute via an internet transaction?

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