E.1 General

This annex documents the history of technical modifications made to ISO/TS 10303-517.

Unless otherwise specified all modifications are upwardly compatible to the previous edition. Modifications to EXPRESS specifications are upwardly compatible if:

• instances encoded according to ISO 10303-21, and that conform to an ISO 10303 application protocol based on the previous edition of this document, also conform to a revision of that application protocol based on this edition of this document;
• interfaces that conform to ISO 10303-22 and to an ISO 10303 application protocol based on the previous edition of this document, also conform to a revision of that application protocol based on this edition of this document;
• the mapping tables of ISO 10303 application protocols based on the previous edition of this document remain valid in a revision of that application protocol based on this edition of this document.

E.2 Changes made in edition 2

E.2.1 Summary of changes

The second edition of this document incorporated the modifications to the first edition listed below.

E.2.2 Changes made to schema aic_mechanical_design_geometric_presentation

The following EXPRESS declarations and interface specifications have been added:

• REFERENCE_FROM presentation_organization_schema;
• TYPE mechanical_design_geometric_presentation_area_items.

The following EXPRESS declarations and interface specifications have been modified:

• USE_FROM geometry_schema;
• USE_FROM presentation_appearance_schema;
• USE_FROM presentation_organization_schema;
• USE_FROM presentation_resource_schema;
• ENTITY mechanical_design_geometric_presentation_area;
• ENTITY mechanical_design_geometric_presentation_representation.

The following EXPRESS declarations and interface specifications have been removed:

• USE_FROM measure_schema;
• ENTITY aspect_ratio;
• ENTITY camera_image_3d_with_scale;
• ENTITY draughting_pre_defined_colour;
• ENTITY draughting_pre_defined_curve_font.

E.3 Changes made in edition 3

E.3.1 Summary of changes

The third edition of this document incorporated the modifications to the second edition listed below.

E.3.2 Changes made to schema aic_mechanical_design_geometric_presentation

The following EXPRESS declarations and interface specifications have been modified:

• USE_FROM presentation_organization_schema;
• REFERENCE_FROM presentation_organization_schema.

E.4 Changes made in edition 4

E.4.1 Summary of changes

This fourth edition of this document incorporates the modifications to the third edition listed below.

E.4.2 Changes made to schema aic_mechanical_design_geometric_presentation

The following EXPRESS declarations and interface specifications have been modified:

• ENTITY mechanical_design_geometric_presentation_representation
  Removed WR 8.

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