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1.23.3.1.158 HL7 Version 2 Table http://hl7.org/fhir/v2/0158 
This is a table defined as part of HL7 v2.
Formal value Set definition (identifier http://hl7.org/fhir/v2/vs/0158): XML or JSON
Date/time selection qualifier
| Code | Description | Version |
| 1ST | First value within range | added v2.2, removed after v2.6 |
| ALL | All values within the range | added v2.2, removed after v2.6 |
| LST | Last value within the range | added v2.2, removed after v2.6 |
| REV | All values within the range returned in reverse chronological order (This is the default if not otherwise specified.) | added v2.2, removed after v2.6 |