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 retention and archiving.

Major subdivisions of this document are:

• drawing_definition_schema;
• draughting_element_schema;
• draughting_dimension_schema.

This part of ISO 10303 specifies the system-independent representation of digital CAD data resulting from the application of draughting practices in the drawing depiction of product definition data.

The drawing definition schema specifies the resources necessary for the identification, description, organization, and administration of drawing and drawing sheet versions.

The draughting element schema specifies the resources representing basic draughting elements such as dimension lines, projection lines, leader lines and the use of these resources in combination with other annotation curves, symbols, and text to depict information found on the drawing sheet.

The draughting dimension schema specifies the resources necessary for the use of basic draughting elements, in combination with other annotation curves, symbols, and text, to depict dimensions, tolerances, and dimension-related information on a drawing sheet.

The objective of this part is the system-independent representation of digital CAD data resulting from the application of draughting practices in the drawing depiction of product definition data. This part of ISO 10303 provides for the representation of draughting information not provided for in other integrated resource Parts of ISO 10303. Where necessary, it provides the draughting semantic extension to information represented in those Parts.

Requirements and practices regarding the draughting-specific use, appearance, and specific aggregation of curves, symbols, and text are specified in draughting-practices standards regarding technical drawings, such as those compiled in ISO Standards Handbook Technical drawings [5].

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

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

• Figure 1 — The relationship of the schemas of this part to the ISO 10303 integration architecture (1 of 1)

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