instance of a specific value together with an identifier for a data dictionary entry that defines a property
description of an entity by the class to which it belongs and a set of property values
NOTE ISO 13584, ISO 15926, ISO 22745, ISO 13399, and ISO/TS 29002 all include characteristic data in their data models.
EXAMPLE The item "Hex Cap Screw - A193 Grade B7,.250-20 X 1.250" appears in a manufacturer's catalogue. It can be described as:
Class: hexagon cap screw
Property values:
[material specification, A193 Grade B7]
[diameter, 0.250 in]
[thread pitch, 20/in]
[length, 1.250 in]
In actual characteristic data, the first element of each bracketed pair would be an identifier for a data dictionary entry. The elements are shown decoded here for clarity.