X_REFERENCE_TYPE is a [fixed lexicon] with the following values:\\

%%zebra-table
||Saved\\Value||Displayed Value
| 00 | Not Specified
| 01 | Employer
| 02 | Friend
| 03 | Relative
| 04 | Associate
| 05 | Professional
| 06 | Co-Worker
| 07 | Supervisor
%%