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

%%zebra-table
||Saved\\Value||Displayed Value
| 00 | Not Specified
| 01 | Hire Date
| 02 | Seniority Date
| 03 | Original Hire Date
| 04 | Assign Start Date
| 05 | Next Review Date
| 06 | Assign Eff Date
| 07 | Job Seniority Date
| 08 | Wage Progression Date
%%