Delivering XML with Data
Depending upon the applications, there are two methods of using XML data as a communication platform between a client and a server.
1 . Using the database engine to generate the XML data.
2. Using middleware systems to convert to/from XML and the legacy infrastructure.
Database created XML, can only incorporate data contained within the database system. It is harder to flexibly represent some data, since it deals with individual rows and not hierarchical data. For data that is riot changing frequently, it is the fastest choice, as the XML data is generated only upon changes, not every time a client requests it. If data mining is a requirement, the only real solution then becomes
generating the XML data from a SOL Server, since there are few tools for OLAP processing in the middleware realm' . Middleware computing can provide a central point of access to many systems, database driven or not. Middleware can also perform rules based processing on data that is being translated. However the middleware approach can be expensive to build and may be overkill for a specific application. It tart also be slower than database created XML for data that is not .changing frequently.
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