ISO 10303-214:2010(E)
A Datum_target is a designated geometric element on the surface of a part used to locate the part in a datum reference frame.
NOTE The concept of datum for tolerancing is defined in ISO 5459 [20].
EXAMPLE Figure 26 shows how datum targets are presented on a drawing.
Each Datum_target is a Target_area or a Placed_target.
The data associated with a Datum_target are the following:
id
The id specifies the identifier of the Datum_target in a Datum_defined_by_targets.
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