Fair enough - we have also had this request (and it would result in a 
nice setup).

However GeoTools developers are getting paid work to chase after GML3 
and the ISO Feature model. As an architect guy I am doing my best to let 
everyone get along; we will see how it goes.

The *biggest* strength of a the JUMP (lets call it *plain*) feature 
model is that it can be quickly implemented by domain objects. At the 
end of the day you are getting very close to a Map with known keys.

Aside: I think we have a bit of confusion in your posting about the 
difference tradeoffs between feature collection and allowing 
associations between features. A feature collection is literally defined 
by the association it is representing ....

You may find it easier to think of the Layer owning the Features, and 
using FeatureCollection as a way of answering questions like "what 
features are on the screen", and "what features are new" (ie use feature 
collections to express association not ownership).

If you look at the ISO FeatureModel the FeatureType of a 
FeatureCollection is used to document why the members are gathered 
together. We went into the requirements gather exercise with the 
restriction of being able to expression spatial, temporal and 
containment associations.

Cheers,
Jody

Sunburned Surveyor wrote:
> I put up a recent blog post about what form OpenJUMP's Feature Model
> will look like in the future. This might be of interest to the
> GeoTools developers because I am advocating a course that I think
> differs from the one that GeoTools took. This is basicly enforcement
> of simplicity at the cost of some functionality.
>
> At any rate, some of you might be interested in reading it.
>
> http://openjump.blogspot.com/
>
> The Sunburned Surveyor
>
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