Assertion: designation's letter | /r/HasProperty | an/aaa-nnn
Facets:
Source sentences:
text: In the JETDS system, complete equipment sets or systems are designated with a sequence of letters and digits prefixed by AN/, then three letters, a hyphen, a number, and (occasionally) some optional letters (AN/AAA-nnn suffixed by (Vn) {hardware/software version} or (T) {training equipment} .