ISO 10303-214:2010(E)
An Annotation_symbol is an annotation presenting a symbol.
An Annotation_symbol is either user-defined, externally defined, or pre-defined. The set of pre-defined symbols comprises the following:
An Annotation_symbol is a type of Annotation_element.
The data associated with an Annotation_symbol are the following:
symbol_definition
The symbol_definition specifies the symbol that defines this annotation.
See annotation_symbol to dimension_symbol, annotation_symbol to general_symbol, annotation_symbol to geometric_tolerance_symbol, annotation_symbol to point_marker_symbol, annotation_symbol to surface_condition_symbol, and annotation_symbol to terminator_symbol for the application assertions.
There shall be exactly one object that defines the symbol_definition for an Annotation_symbol.
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