Hi, I'm wanting to encourage a colleague to use a CRM-based approach to a geographical-themed project. We're talking about geopolitical [and geographical] entities which have a known duration (e.g. 'Abingdon from the 17th century until local government reorganisation in 1974').
This could be modelled as a subclass of E4 Period, which neatly binds together the place and time aspects we want to record. Conversely it could be modelled as a subclass of E53 Place, which would allow us to express relationships between this entity and other geopolitical units using existing properties. I see that there are precedents in the CRM for declaring a class as being a subclass of two different classes (e.g. E45 Address). However I am concerned about the fact that E4 Period already has 'place-ness' inherent in it. Should I be worried? Are there any guidelines I should be looking at? Many thanks, Richard -- *Richard Light*
