F.1 General

This annex documents the history of technical modifications made to ISO/TS 10303-44.

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.

F.2 Changes made in edition 2

F.2.1 Summary of changes

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

F.2.2 Changes made to schema product_structure_schema

The definitions of the following EXPRESS data types have been modified:

• alternate_product_relationship;
• assembly_component_usage;
• assembly_component_usage_substitute;
• make_from_usage_option;
• make_from_usage_option_group;
• next_assembly_usage_occurrence;
• product_definition_usage;
• promissory_usage_occurrence;
• specified_higher_usage_occurrence.

The following EXPRESS declarations and interface specifications have been added:

• ENTITY assembly_component_usage_substitute_with_ranking;
• ENTITY product_definition_occurrence_relationship.

The following EXPRESS declarations and interface specifications have been modified:

• ENTITY alternate_product_relationship;
• ENTITY assembly_component_usage_substitute;
• ENTITY make_from_usage_option;
• ENTITY product_definition_usage;
• ENTITY quantified_assembly_component_usage;
• ENTITY specified_higher_usage_occurrence.

F.2.3 Changes made to schema product_concept_schema

The definitions of the following EXPRESS data types have been modified:

• product_concept.

The following EXPRESS declarations and interface specifications have been added:

• ENTITY concept_feature_operator;
• ENTITY concept_feature_relationship;
• ENTITY concept_feature_relationship_with_condition;
• ENTITY conditional_concept_feature;
• ENTITY product_concept_feature;
• ENTITY product_concept_feature_association;
• ENTITY product_concept_relationship.

The following EXPRESS declarations and interface specifications have been modified:

• ENTITY product_concept.

F.2.4 Changes made to schema configuration_management_schema

The definitions of the following EXPRESS data types have been modified:

• configuration_design;
• configuration_effectivity;
• configuration_item.

The following EXPRESS declarations and interface specifications have been added:

• ENTITY configurable_item;
• ENTITY configuration_design_item;
• ENTITY configuration_item_relationship.

The following EXPRESS declarations and interface specifications have been modified:

• ENTITY configuration_design;
• ENTITY configuration_effectivity;
• ENTITY configuration_item.

F.3 Changes made in edition 3

F.3.1 Summary of changes

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

F.3.2 Changes made to schema product_structure_schema

The following EXPRESS declarations and interface specifications have been added:

• ENTITY multi_level_reference_designator;
• FUNCTION unambiguously_specified_lower_usage_occurrence.

The following EXPRESS declarations and interface specifications have been modified:

• ENTITY assembly_component_usage;
• ENTITY next_assembly_usage_occurrence.

F.3.3 Changes made to schema configuration_management_schema

The following EXPRESS declarations and interface specifications have been added:

• REFERENCE_FROM effectivity_schema.

The following EXPRESS declarations and interface specifications have been modified:

• ENTITY configuration_effectivity.

F.4 Changes made in edition 4

F.4.1 Summary of changes

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

F.4.2 Changes made to schema product_structure_schema

The following EXPRESS declarations and interface specifications have been added:

• TYPE product_definition_occurrence_or_reference;
• TYPE product_definition_or_reference_or_occurrence;
• ENTITY product_definition_occurrence;
• ENTITY product_definition_occurrence_reference;
• ENTITY product_definition_occurrence_reference_with_local_representation;
• ENTITY product_definition_specified_occurrence;
• ENTITY product_definition_usage_relationship;
• FUNCTION acyclic_product_definition_specified_occurrence;
• FUNCTION get_descendant_occurrences.

The following EXPRESS declarations and interface specifications have been modified:

• REFERENCE_FROM product_definition_schema;
• ENTITY next_assembly_usage_occurrence.

F.4.3 Changes made to schema configuration_management_schema

The following EXPRESS declarations and interface specifications have been modified:

• REFERENCE_FROM product_structure_schema;
• TYPE configuration_design_item.

F.5 Changes made in edition 5

F.5.1 Summary of changes

The fifth edition of this document incorporated the modifications to the fourth edition listed below.

F.5.2 Changes made to schema product_structure_schema

The following EXPRESS declarations and interface specifications have been modified:

• ENTITY next_assembly_usage_occurrence
  - DERIVE 'product_definition_occurrence_id' expression changed
   - UNIQUE 'UR2': Attribute References changed ;
• ENTITY product_definition_occurrence
  - WHERE 'WR2' expression changed
    - WHERE 'WR3' expression changed
    - Remove WHERE 'WR4' .

F.6 Changes made in edition 6

F.6.1 Summary of changes

This sixth edition of this document incorporates the modifications to the fifth edition listed below.

F.6.2 Changes made to schema product_structure_schema

The following EXPRESS declarations and interface specifications have been modified:

• ENTITY product_definition_occurrence.

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