Info

Code
E18
Name
Physical Thing

Super

Subs

Range for

Description

This class comprises all persistent physical items with a relatively stable form, man-made or natural. Depending on the existence of natural boundaries of such things, the CRM distinguishes the instances of E19 Physical Object from instances of E26 Physical Feature, such as holes, rivers, pieces of land etc. Most instances of E19 Physical Object can be moved (if not too heavy), whereas features are integral to the surrounding matter. The CRM is generally not concerned with amounts of matter in fluid or gaseous states.