ISO 10303-214:2010(E)
A Dimension is the graphical presentation of the dimension value, of associated information, and of the symbology necessary to accurately depict its area of application.
Dimension objects cover linear dimensions, angular dimensions, curve dimensions, diameter dimensions, ordinate dimensions, radius dimensions, and leader directed dimensions.
For this particular type of Draughting_callout, the inherited attribute 'contents' shall refer to Annotation_curve and Text objects only.
EXAMPLE Examples for the symbology are leaders, projection curves, or dimension curves.
NOTE The Text objects are shared with the 'primary_callout' and, if present, the 'secondary callout'.
A Dimension is a type of Draughting_callout.
The data associated with a Dimension are the following:
The id specifies the identifier of the Dimension.
The primary_callout specifies the first representation of the Dimension. Both the dimension value and the possible tolerance information are expressed in a primary unit of measure.
See dimension to dimension_callout for the application assertion.
The secondary_callout specifies the second representation of the Dimension. Both the dimension value and the possible tolerance information are expressed in a secondary unit of measure.
EXAMPLE The primary unit of measure used by primary_callout could be millimetres and the secondary unit of measure used by secondary_callout could be inches.
See dimension to dimension_callout for the application assertion.
The secondary_callout need not be specified for a particular Dimension.
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