Developing High Quality Data Models

17.32. Employment

Figure 17-32 shows the data model for employment . An employment is an association that has an employer and an employee as participant_in the employment . The employer is a temporal_part_of a party , and the employee is a temporal_part_of a person .

Figure 17-32 HQDM_FRAMEWORK EXPRESS-G diagram 32 of 46.

17.32.1. Employee

A state_of_person that is a participant_in an employment .

EXPRESS specification:

*)

ENTITY employee

SUBTYPE OF(state_of_person, participant);

SELF\participant.participant_in :SET [1:1] OF employment;

END_ENTITY;

(*

Attribute definitions:

participant_in

A