I'm working on a dimensioning capability, in the CAD sense, for Blender, starting from the Blender Caliper plugin. Blender doesn't currently store the dimensions of a "Blender unit", a common piece of data needed for various purposes such as import/export, physics, and dimensioning. This is a good candidate for the ID Property system.
So I looked at the designated place for standardizing ID Properties, at http://wiki.blender.org/index.php/Dev:Source/Blender/Data_System/Property_Standards
. No one has ever defined any. No one has posted to the relevant mailing list since early 2008. Is this the correct place to discuss such matters?
I added an entry at http://wiki.blender.org/index.php/BlenderDev/PropertyStandards/SceneProperties#Units
. Do I need to do that somewhere else?
I just wanted to encourage you to continue along this line of inquiry... I'm a product designer interested in using Blender, but stymied by the general lack of dimensioning. i'm interested in helping any way i can!