HL7 v2.4 Vocabulary
0.1.0 - ci-build

HL7 v2.4 Vocabulary, published by HL7/FO. This guide is not an authorized publication; it is the continuous build for version 0.1.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/frankoemig/hl7.v2.terminology.v24/ and changes regularly. See the Directory of published versions

## CodeSystem: Time Selection Criteria Parameter Class Codes (2.4 - 1.1.0) (Experimental)

Official URL: http://terminology.hl7.org/v2plusvocab/CodeSystem/timeSelectionCriteriaParameterClass | Version: 1.1.0
Active as of 2026-01-27 | Computable Name: TimeSelectionCriteriaParameterClass
Other Identifiers: OID:2.16.840.1.113883.18.183
Copyright/Legal: HL7 Inc., 2026

Code system of concepts used to describe acceptable start and end times, as well as days of the week, for appointment or resource scheduling. Used in HL7 Version 2.x messaging in the SCV and APR segments.

This Code system is referenced in the content logical definition of the following value sets:

- Hl7VStimeSelectionCriteriaParameterClassCodes

Properties

This code system defines the following properties for its concepts

Name | Code | URI | Type | Description
versionIntroduced | versionIntroduced | http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#versionIntroduced | string | version when was this code introduced
versionDeprecated | versionDeprecated | http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#versionDeprecated | string | version when was this code deprecated
status | status | http://hl7.org/fhir/concept-properties#status | code | A code that indicates the status of the concept. Typical values are active, experimental, deprecated, and retired
comment | comment | http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#comment | string | A string that provides additional detail pertinent to the use or understanding of the concept
usage | usage | http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#usage | string | usage notes for this code
modified | modified | http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#modified | dateTime | date of last modification

Concepts

This case-insensitive code system `http://terminology.hl7.org/v2plusvocab/CodeSystem/timeSelectionCriteriaParameterClass` defines the following codes:

Code | Display | Definition | versionIntroduced
Fri | An indicator that Friday is or is not preferred for the day on which the appointment will occur. OK = Preferred appointment day; NO = Day is not preferred | An indicator that Friday is or is not preferred for the day on which the appointment will occur. OK = Preferred appointment day; NO = Day is not preferred | 2.4
Mon | An indicator that Monday is or is not preferred for the day on which the appointment will occur. OK = Preferred appointment day; NO = Day is not preferred | An indicator that Monday is or is not preferred for the day on which the appointment will occur. OK = Preferred appointment day; NO = Day is not preferred | 2.4
Prefend | The preferred end time for the appointment request, service or resource. Any legal time specification in the format HHMM, using 24-hour clock notation | The preferred end time for the appointment request, service or resource. Any legal time specification in the format HHMM, using 24-hour clock notation | 2.4
Prefstart | The preferred start time for the appointment request, service or resource. Any legal time specification in the format HHMM, using 24-hour clock notation | The preferred start time for the appointment request, service or resource. Any legal time specification in the format HHMM, using 24-hour clock notation | 2.4
Sat | An indicator that Saturday is or is not preferred for the day on which the appointment will occur. OK = Preferred appointment day; NO = Day is not preferred | An indicator that Saturday is or is not preferred for the day on which the appointment will occur. OK = Preferred appointment day; NO = Day is not preferred | 2.4
Sun | An indicator that Sunday is or is not preferred for the day on which the appointment will occur. OK = Preferred appointment day; NO = Day is not preferred | An indicator that Sunday is or is not preferred for the day on which the appointment will occur. OK = Preferred appointment day; NO = Day is not preferred | 2.4
Thu | An indicator that Thursday is or is not preferred for the day on which the appointment will occur. OK = Preferred appointment day; NO = Day is not preferred | An indicator that Thursday is or is not preferred for the day on which the appointment will occur. OK = Preferred appointment day; NO = Day is not preferred | 2.4
Tue | An indicator that Tuesday is or is not preferred for the day on which the appointment will occur. OK = Preferred appointment day; NO = Day is not preferred | An indicator that Tuesday is or is not preferred for the day on which the appointment will occur. OK = Preferred appointment day; NO = Day is not preferred | 2.4
Wed | An indicator that Wednesday is or is not preferred for the day on which the appointment will occur. OK = Preferred appointment day; NO = Day is not preferred | An indicator that Wednesday is or is not preferred for the day on which the appointment will occur. OK = Preferred appointment day; NO = Day is not preferred | 2.4