Wankers, 

Wondering if anyone's gone through the work of creating an OGC 
FilterCapabilities document to describe an OpenSearch Geo service? 

We're looking at doing this to satisfy a customer request, but realize that 
other than defining the Operand and Operator types we support, that there's 
things the FilterCapabilities document simply doesn't seem to express. 

The first four capabilities below are implied with OGC Filters, but OpenSearch 
doesn't have those concepts ... the last is the reverse: 
# spatial reference systems transformation 
# property name references 
# "not" operator 
# multiple spatial filters 
# location name as spatial filter 

Unless there's a better solution, we'll probably just include a written 
description that describes the subset (and superset) functionality. 

Chris 

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