HL7 v2.8.1 Vocabulary
0.2.0 - ci-build

HL7 v2.8.1 Vocabulary, published by HL7/FO. This guide is not an authorized publication; it is the continuous build for version 0.2.0 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.v281/ and changes regularly. See the Directory of published versions

## CodeSystem: Time Selection Criteria Parameter Class Codes (2.8.1 - 1.1.0) (Experimental)

Official URL: http://terminology.hl7.org/v2plusvocab/CodeSystem/timeSelectionCriteriaParameterClass | Version: 1.1.0
Active as of 2026-03-13 | Computable Name: TimeSelectionCriteriaParameterClass
Other Identifiers: OID:2.16.840.1.113883.18.183, urn:ietf:rfc:3986#Uniform Resource Identifier (URI)#http://terminology.hl7.org/v2plusvocab/CodeSystem/v2-0294
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
version introduced | versionIntroduced | http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#versionIntroduced | string | version when was this code introduced
version deprecated | 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, to suppress IG-publisher warning, to be replaced with standard later | 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 | version introduced | usage
Fri | An indicator that Friday is or is not preferred for the day on which the appointment will occur. | An indicator that Friday is or is not preferred for the day on which the appointment will occur. | 2.4 | In component 2, specify OK or NO.<p>OK = Preferred appointment day NO = Day is not preferred
Mon | An indicator that Monday is or is not preferred for the day on which the appointment will occur. | An indicator that Monday is or is not preferred for the day on which the appointment will occur. | 2.4 | In component 2, specify OK or NO.<p>OK = Preferred appointment day NO = Day is not preferred
Prefend | An indicator that there is a preferred end time for the appointment request, service or resource. | An indicator that there is a preferred end time for the appointment request, service or resource. | 2.4 | In component 2, specify any valid time in the format HHMM, using 24-hour clock notation where HH = hour and MM = minutes
Prefstart | An indicator that there is a preferred start time for the appointment request, service or resource. | An indicator that there is a preferred start time for the appointment request, service or resource. | 2.4 | In component 2, specify any valid time in the format HHMM, using 24-hour clock notation where HH = hour and MM = minutes
Sat | An indicator that Saturday is or is not preferred for the day on which the appointment will occur. | An indicator that Saturday is or is not preferred for the day on which the appointment will occur. | 2.4 | In component 2, specify OK or NO.<p>OK = Preferred appointment day NO = Day is not preferred
Sun | An indicator that Sunday is or is not preferred for the day on which the appointment will occur. | An indicator that Sunday is or is not preferred for the day on which the appointment will occur. | 2.4 | In component 2, specify OK or NO.<p>OK = Preferred appointment day NO = Day is not preferred
Thu | An indicator that Thursday is or is not preferred for the day on which the appointment will occur. | An indicator that Thursday is or is not preferred for the day on which the appointment will occur. | 2.4 | In component 2, specify OK or NO.<p>OK = Preferred appointment day NO = Day is not preferred
Tue | An indicator that Tuesday is or is not preferred for the day on which the appointment will occur. | An indicator that Tuesday is or is not preferred for the day on which the appointment will occur. | 2.4 | In component 2, specify OK or NO.<p>OK = Preferred appointment day NO = Day is not preferred
Wed | An indicator that Wednesday is or is not preferred for the day on which the appointment will occur. | An indicator that Wednesday is or is not preferred for the day on which the appointment will occur. | 2.4 | In component 2, specify OK or NO.<p>OK = Preferred appointment day NO = Day is not preferred