ISO 10303-214:2010(E)
A Datum_feature_callout is a callout that is used to denote a point, line, or plane as a datum and that specifies the designation to be used as identification of that datum.
EXAMPLE The top view in Figure 25 shows some Datum_feature_callout objects for datums labeled 'E' and 'F'.
A Datum_feature_callout is a type of Draughting_callout.
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