ISO 10303-214:2010(E)
An Appearance_assignment is the assignment of visual appearance characteristics to geometric elements and to annotation.
The appearance can be defined explicitly for each represented element or for a context in which the elements are represented. Several appearance components for the representation of the different kinds of elements can be associated with the Appearance_assignment.
Each Appearance_assignment may be a Context_dependent_appearance_assignment.
The data associated with an Appearance_assignment are the following:
component
The component specifies the various appearance objects that define the appearance of geometric and annotation objects.
NOTE Each object included in appearance_select is related to one or more Appearance_assignment object.
See appearance_assignment to curve_appearance, appearance_assignment to hatching, appearance_assignment to point_appearance, appearance_assignment to solid_fill_area, appearance_assignment to surface_appearance, appearance_assignment to text_appearance, and appearance_assignment to tiling for the application assertions.
There shall be at least one object that defines the component for an Appearance_assignment.
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