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From "Eddie Epstein" <eaepst...@gmail.com>
Subject Re: Non-matching filter?
Date Sat, 05 Jan 2008 12:56:20 GMT
If a city can only be included in a single location, a simple approach would
be to add a feature to the city type which indicates if the annotation has
been added to a location. If a city can be in multiple locations, and
locations can be modified or removed, the feature in city would have to be
multivalued, e.g. a linked list.


On Jan 4, 2008 2:12 PM, jonathan doklovic <jdoklovic@ibsys.com> wrote:

> Hi,
> I have been looking at Contraints and Filters.
> I understand how to use them to get an iterator that matches a certain
> type, but I want to do the opposite....
> I have annotations for 3 types: City, State, and Location (where
> location contains a city and a state)
> Now I want to create a filtered iterator that basically returns any city
> annotations that are NOT already within a Location annotation.
> Is there any way to do this?
> Thanks,
> - Jonathan

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