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The XML::XQL module implements the XQL (XML Query Language) proposal submitted to the XSL Working Group in September 1998. The spec can be found at: http://www.w3.org/TandS/QL/QL98/pp/xql.html. Most of the contents related to the XQL syntax can also be found in the XML::XQL::Tutorial that comes with this distribution. Note that XQL is not the same as XML-QL!

The current implementation only works with the XML::DOM module, but once the design is stable and the major bugs are flushed out, other extensions might follow, e.g. for XML::Grove.

XQL was designed to be extensible and this implementation tries to stick to that. Users can add their own functions, methods, comparison operators and data types. Plugging in a new XML tree structure (like XML::Grove) should be a piece of cake.