Introduction

ISO 10303 is an International Standard for the computer-interpretable representation of product information and for the exchange of product data. The objective is to provide a neutral mechanism capable of describing products throughout their life cycle. This mechanism is suitable not only for neutral file exchange, but also as a basis for implementing and sharing product databases, and as a basis for archiving.

This part of ISO 10303 is a member of the integrated resources series. Major subdivisions of this part of ISO 10303 are:

• classification_schema;
• set_theory_schema.

This part of ISO 10303 specifies an application resource for the representation of classes or sets and classification relationships. This part of ISO 10303 also supports the following set theory relationships:

• complement;
• intersection;
• power set;
• proper subset;
• same membership (that is, set equality);
• subset;
• union.

The relationships of the schemas in this part of ISO 10303 to other schemas that define the integrated resources of this International Standard are illustrated in Figure 1 using the EXPRESS-G notation. EXPRESS-G is defined in Annex D of ISO 10303-11.

The following schemas not found in this part of ISO 10303 are shown in Figure 1:

• group_schema is found in ISO 10303-41;
• management_resources_schema is found in ISO 10303-41;
• support_resource_schema is found in ISO 10303-41.

The schemas illustrated in Figure 1 are components of the integrated resources.

• Figure 1 — Relationship between schemas in ISO 10303-54

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