Track types differentiate appointees based on rank, eligibility for promotion, sabbatical programs, etc. into logical groupings such as tenure-line faculty, visiting faculty, postdoctoral scholars, etc.
An Identifier is a designation to indicate whether an academic appointment track is primary, dual, joint, administrative, etc. The Primary identifier is the home department. Other academic appointment identifiers include Dual (additional appointments within the same school [e.g., appointments in Biology and Chemistry in Arts and Sciences]), and Joint (additional appointments across schools [e.g., Economics in Arts and Sciences and International Business School]). Administrative appointments, such as, department/programchairs or deans, are indicated by the Administrative track type and identifier.
An association is used to identify a relationship with a school, department, or program that is not a formal appointment.