Querying Remote Data Stores From Application?

Dec 5, 2010

I am writing an ASP.NET application that suppose to connect to many different data stores and query them for data. Each data store contains different data: it can be an SQL DB, an XML file, or anything that can store data. The result is always an XML.

The remote data stores expose a WCF service (which I will also implement) that will allow me to query the data store and return the results.

My question is: how exactly should I implement the querying mechanism? Should I define my own query language?

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