This part of ISO/IEC 24751 provides a common information model for describing the learner or user needs and preferences when accessing digitally delivered resources or services. This description is one side of a pair of descriptions used in matching user needs and preferences with digital delivery (as described in ISO/IEC 24751-1). This model divides the personal needs and preferences of the learner or user into three categories:

a. Display: how resources are to be presented and structured;

b. Control: how resources are to be controlled and operated; and,

c. Content: what supplementary or alternative resources are to be supplied.

This part of ISO/IEC 24751 is intended to meet the needs of learners with disabilities (as defined in ISO/IEC 24751-1) and of anyone in a disabling context.

The purpose of this part of ISO/IEC 24751 is to provide a machine-readable method of stating user needs and preferences with respect to digitally based education or learning. This part of ISO/IEC 24751 can be used independently, for example to deliver the required or desired user interface to the learner/user, or in combination with ISO/IEC 24751-3 to deliver digital resources that meet a user’s needs and preferences.