Proposed Subclasses for Thing

Hi Folks,

I am frequently hitting limitations in the 'Thing' class which is my
primary area of interest.

To start with I would propose a subclass for Thing called 'Construction'
which would have two primary subclasses: 'mobile' and 'static'.

Examples of static Constructions would be highways, lighthouses and
bridges.  Yes, these could be deemed places rather than things, but in my
mind, because they are constructed, rather than geographical in nature,
they are things, unlike say, the Grand Canyon, or Australia.

Examples of mobile Constructions would be ships, planes, satellites,
elevators.  Some of these things could be 'ProductModels' but I have been
trying to wrestle with shoe-horning them into the ProductModel and it seems
a bit like a square peg in a round hole.  Is the USS Constitution really a
'ProductModel' - I think not.  How about the ISS - a product?  Not really.

Am I thinking about this all wrong and should these general types of
objects belong somewhere else rather than 'Thing'?  If I am correct, I am
certainly willing to do the leg-work of proposing relevant taxonomy
appropriate properties for each object.

Please advise with either 'you have your head inserted in your posterior'
or 'yes - good idea - here is what you need to do to move forward'.

Thanks

-- 
George Michaels
Founder, TroveStar LLC
gdm@trovestar.com
www.trovestar.com