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An XML appliance is a separate Computer System with deliberately narrow functionality that exchanges XML messages with other computer systems. XML appliances are designed specifically to be easy to Install , configure and manage. XML appliances frequently include specialized hardware and software to accelerate the processing of XML messages. HISTORY OF XML APPLIANCES The first XML appliances were created by engineers that required a large volume of XML Transformation s. They created specialized Application-specific Integrated Circuit s that performed transformations up to 100 times faster than software-only solutions. Although there were some early adopters of these systems, it was initially restricted to large e-commerce sites such as Yahoo! and Amazon . Early entrants to this field include vendors such as DataPower (now owned by IBM ) and Sarvega (now owned by Intel ). A second round of XML appliances started to appear around 2003 , when these devices were used to exchange SOAP XML messages between computers on public networks. These messages required advanced security features such as Encryption , Digital Signatures and Denial Of Service Attack prevention. Because the setup and configuration of software-only systems was time consuming, companies could save a great deal of money by using appliances that were pre-packaged with WS-Security standards built in. COMMON FEATURES OF XML APPLIANCES
CLASSIFICATION OF XML APPLIANCES Although the term XML appliance is the most general term to describe these devices, most vendors use alternative terminology that describe more specific functionality of these devices. The following are alternative names used for XML Appliances:
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