F.1 General

This annex documents the history of technical modifications made to ISO/TS 10303-1819.

F.2 Changes made in edition 2

F.2.1 Summary of changes

The second edition of this part of ISO 10303 incorporated the modifications to the first edition listed below.

F.2.2 Changes made to the ARM

The following ARM EXPRESS declarations and interface specifications have been added:

• TYPE angular_deviation;
• TYPE chordal_deviation;
• TYPE maximum_edge_length;
• TYPE tessellated_facet_long_short_edge_ratio;
• TYPE tessellation_accuracy_parameter_item;
• ENTITY Cubic_bezier_tessellated_edge;
• ENTITY Cubic_bezier_triangulated_face;
• ENTITY Cubic_tessellated_connecting_edge;
• ENTITY Tessellated_shape_representation_with_accuracy_parameters.

The following ARM EXPRESS declarations and interface specifications have been modified:

• ENTITY Coordinates_list;
• ENTITY Repositioned_tessellated_item;
• ENTITY Tessellated_annotation;
• ENTITY Tessellated_connecting_edge;
• ENTITY Tessellated_edge;
• ENTITY Tessellated_face;
• ENTITY Tessellated_item;
• ENTITY Tessellated_shape_representation.

In addition, modifications have been made to the mapping specification, the MIM schema and the EXPRESS-G diagrams to reflect and be consistent with the modifications of the ARM.

F.2.3 Changes made to the MIM

The following MIM EXPRESS declarations and interface specifications have been added:

• ENTITY cubic_bezier_tessellated_edge;
• ENTITY cubic_bezier_triangulated_face;
• ENTITY cubic_tessellated_connecting_edge.

The following MIM EXPRESS declarations and interface specifications have been modified:

• USE_FROM geometric_model_schema.

F.3 Changes made in edition 3

F.3.1 Summary of changes

This third edition of this part of ISO 10303 incorporates the modifications to the second edition listed below.

F.3.2 Changes made to the ARM

The following ARM EXPRESS declarations and interface specifications have been modified:

• TYPE edge_or_curve;
• TYPE face_or_surface.

In addition, modifications have been made to the mapping specification, the MIM schema and the EXPRESS-G diagrams to reflect and be consistent with the modifications of the ARM.

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