| Distinct Run from Segment table, mainly for RUNS DB. |
| name | type | length | unit | ucd | description |
| segmentID | bigint | 8 | ID_AREA | Unique segment identifier | |
| run | smallint | 2 | OBS_RUN | Run number | |
| rerun | smallint | 2 | CODE_MISC | Rerun number | |
| field0 | int | 4 | ID_FIELD | Starting field number | |
| nFields | int | 4 | NUMBER | Number of fields in this segment |