The global Body element is the highest level topology structure in the boundary representation modeling approach. It is the parent for all topology elements which it contains.
The optional size attribute defines a recommended size for visualization of an infinite drawable element such as plane, cylinder, axis, etc., or objects without explicit geometric parameters (e.g. coordinate system).
The optional transparency attribute defines the transparency property of a model entity.
Source
<xs:element name="Body" type="BodyType"><xs:annotation><xs:documentation>The global Body element is the highest level topology structure in the boundary representation modeling approach. It is the parent for all topology elements which it contains.</xs:documentation></xs:annotation></xs:element>