field designator

field designator

[′fēld ¦dez·ig‚nād·ər]
(computer science)
A character generally placed at the beginning of a field to specify the nature of the data contained in it.
References in periodicals archive ?
The Army is reconsidering the timing for Career Field Designator for some branches and even for FA 34.
FY02 Career Field Designation Board: There were 11% of MI Officers who were in career field designators this past summer that were selected for career fields outside operations (basic branch).