ISO 10303-214:2010(E)
An External_geometric_model is the identification of a model that contains geometry in a 3D context only.
An External_geometric_model is a type of External_model.
Each External_geometric_model may be an External_geometric_model_with_parameters.
The data associated with an External_geometric_model are the following:
model_extent
The model_extent specifies the radius of a sphere that contains all elements of the model and whose centre is at the origin of the Cartesian_coordinate_space of the External_geometric_model. The model_extent is specified using a length unit.
The model_extent need not be specified for a particular External_geometric_model.
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