ISO/TS 10303-1233:2011-10 specifies the application module for
Requirement assignment.

The following are within the scope of
ISO/TS 10303-1233:2011-10:

• the assignment of a requirement to a product or other item;
• the identification a source of a requirement;
• items within the scope of application module Requirement view definition, ISO/TS 10303-1141.