ISO 10303-214:2010(E)
A Dimension_callout is a combination of text and of symbology that conveys presentation information about a dimension. This includes the dimension value, dimension units, tolerance information and any related notes.
The data associated with a Dimension_callout are the following:
The callout_element specifies the text and possibly symbol that form the Dimension_callout.
See dimension_callout to dimension_symbol and dimension_callout to text for the application assertions.
There shall be at least one object that defines the callout_element for a Dimension_callout.
The is_displaying specifies the Geometric_dimension that is displayed by the Dimension_callout.
See dimension_callout to geometric_dimension for the application assertion.
The is_displaying need not be specified for a particular Dimension_callout.
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