Hi Tobias,

You can also try to define a GET method that returns the local id, e.g.

	GET http://lxkramer13.informatik.tu-muenchen.de:8180/OpenTox/feature_definition/{feature_definition_id}/id

should return

	{feature_definition_id}

> 
> If we use just something like CDK_topoShape as ID instead of a URI, we
> have the problem that this would have to be unique over the whole
> OpenTox system to prevent mix ups.

I suggest to move the feature-definition part to the feature-ontology
(which should use a controlled vocabulary with unique feature names).

Best regards,
Christoph