ISO/TS 10303-1291:2008 specifies the application module for Plib class reference.
The following are within the scope of ISO/TS 10303-1291:2008:
- the identification of a class in a library compliant to ISO 13584 (Parts Library);
- items within the scope of application module External class, ISO/TS 10303-1275;
- items within the scope of application module External item identification assignment, ISO/TS 10303-1128;
- items within the scope of application module Person organization assignment, ISO/TS 10303-1013.