1 Scope
1.1 In scope
This document is applicable to:
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— the Presentation of 3D geometrical dimension and tolerance, and 3D annotation attributes;
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— their possible semantic links with 3D Geometric shape;
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— User Defined Attributes: that are assigned to 3D geometric entities or at the part level.
For the purpose of this document, the semantic definition is at the level that supports
associative “Cross-highlighting”, to illustrate the portion of the geometry to which
a PMI element applies.
In this version, the technology used to preserve this 3D information is based on polyline
and tessellated presentation. Polyline presentation is a conversion to lines and curves of all 3D annotations by the STEP interfaces
of the CAD system, including validation properties. Tessellated presentation is a conversion to tessellated curves and tessellated faces. The main use cases are
the Certification and Product Liability of static information, however, re-use is
also possible after the deletion of previous PMI and creation of new PMI (refer to
clause 3 for definition).