Web Services
A web service is a software application on a network that has an interface through which other programs can gain access. Web services can be as simple as a mortgage calculator program or as complex as a Fortune 500 software application built from components from y all over the world. They are currently being used to help large and small businesses get the most from their Information Technology resources by allowing the integration of diverse software applications, from desktop programs to large enterprise-wide systems. Not only are web services useful for day-to-day operations of a company, but they are especially helpful for post- merger or post-acquisition system merger. (Geerts,Paretta & White, 2004).XML, the root markup language and key ingredient for creating web services, is gaining in popularity, according to IDC, which has seen the growth in XML-based servers go up by 160% over the last year. Forrester Research, Cambridge, Mass., notes that $500 million has already been spent on early projects in the financial services sector, while Gartner-Group, Stamford, Conn., suggests that the web services software market will reach $1.7 billion in the U.S. by next year and balloon up from there.( Ismail,
From a user's perspective, a software application must be able to issue the appropriate commands, put them in a SOAP envelope, and send them to the web service interface for processing. This usually requires downloading the WSDL and plugging it into a software application. For example, to use the Xmethods delayed stock quote web service, users employ a web browser to access the WSDL, plug it into an Excel spreadsheet, click the "insert stock quotes" icon that gets added to the Excel tool bar, and fill in the necessary information in the po-pup window. Because the Excel spreadsheet knows how to process XML, it packages the commands in a SOAP envelope addressed to the web service and sends it. When the return SOAP envelope arrives from the web service, Excel knows how to process it and insert the requested data in the appropriate cells. All current software packages, including Microsoft Office, Internet Explorer, and Quicken, can understand and process XML and can therefore interface with web services. General ledger and other accounting packages should soon become XML-enabled. The key to making web services work is data, process, and communication standards. The communication protocol standard is the same as the Internet, TCP/IP. All computers can understand TCP/IP. Web services implement the client-server model over the World Wide Web). On the client side, for example, they manage the different creen shapes and sizes and the different connection speeds of desktop computers, mobile telephones, and PDAs. On the server side, the various programming languages and middleware technologies at work behind each application or data source become transparent to programmers, so it is a lot easier for them to develop applications. The data standard for TCP/IP is XML, a set of syntax rules for adding meaning to data and for building other XML standards. The process standards ar
Some common words found in the essay are:
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Approximate Word count = 1267
Approximate Pages = 5 (250 words per page double spaced)
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