ISO/TS 10303-1742:2006 specifies the application module for Shape composition.

The following are within the scope of ISO/TS 10303-1742:2006:

• identification of an association between shape elements, specifying that one shape element is a boundary or a portion of boundary of another shape element;
• identification of an association between shape elements, that associates shape element to a second shape element, to which the first shape element is constituent;
• identification of an association between shape elements, specifying that one shape element is composed of second shape element;
• identification of an association between shape elements, in which the associated shape elements are located in relation to each other;
• identification of shape element, that is composed of other constituent shape elements;
• items within the scope of application module Shape property assignment, ISO/TS 10303-1032.