Query on a range of values - any tools?

[Roger L. Costello]

Hello Folks,

Has anyone created a query tool to allow querying on a range of values? 
For example, if an XML document contains map data, including latitudes
and longitudes, I would like to be able to query for all data within a
certain lat/lon range.

I don't believe that this can be done using XQL, although I may be
mistaken.  /Roger


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