On Wed, 4 Jun 2003, Ben Soares wrote:
> >From Philip Abrahamson <[log in to unmask]>:
> Something that should be noted here is that there are a number of
> different geographic search relationships (GEO attribute set defines:
> Overlaps, Fully Enclosed Within, Encloses, Fully Outside Of, Near, in
> >From Eddie Boyle <[log in to unmask]>:
> Mike also is only mentioning 'within' relation operators - but in a geo
> sense others are needed, including overlap and proximity operators.
As I said the first time this was brought up, though admittedly a long
time ago, overlaps can be expressed by the partial relation modifier and
applies to all ranges/areas not just geographical ones.
foo.centuryDateRanges within/partial "1780 1820"
1780-1820 overlaps (ie is at least partially within) two centuries.
So with booleans and partial, when I did the matrix last time, I'm fairly
sure I could express all of the GEO profile relations, but we should
probably do the exercise again.
,'/:. Rob Sanderson ([log in to unmask])
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