---
type: "valueset"
title: "All UCUM Expression for Time"
valueset: "all-time-units"
---
# All UCUM Expression for Time

- **Status**: draft
- **Name**: AllUCUMExpressionForTime
- **Title**: All UCUM Expression for Time
- **Publisher**: HL7 International / FHIR Infrastructure
- **Description**: Unified Code for Units of Measure (UCUM). This value set includes all possible UCUM codes used for time measures (Age, Duration etc.) - that it is, all units which have the same canonical unit as 'a' (year)

## Content (Compose)

- **System**: http://unitsofmeasure.org | **Filters**: canonical = a

## ValueSet XML



```xml
<?xml version="1.0" encoding="UTF-8"?>

<ValueSet xmlns="http://hl7.org/fhir">
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-wg">
    <valueCode value="fhir"/>
  </extension>
  <name value="AllUCUMExpressionForTime"/>
  <title value="All UCUM Expression for Time"/>
  <status value="draft"/>
  <experimental value="true"/>
  <publisher value="HL7 International / FHIR Infrastructure"/>
  <contact>
    <telecom>
      <system value="url"/>
      <value value="http://www.hl7.org/Special/committees/fiwg"/>
    </telecom>
  </contact>
  <description value="Unified Code for Units of Measure (UCUM). This value set includes all possible UCUM codes used for time measures (Age, Duration etc.) - that it is, all units which have the same canonical unit as 'a' (year)"/>
  <copyright value="The UCUM codes, UCUM table (regardless of format), and UCUM Specification are copyright © 1999-2009, Regenstrief Institute, Inc. and the Unified Codes for Units of Measures (UCUM) Organization. All rights reserved."/>
  <compose>
    <include>
      <system value="http://unitsofmeasure.org"/>
      <filter>
        <property value="canonical"/>
        <op value="="/>
        <value value="a"/>
      </filter>
    </include>
  </compose>
</ValueSet>
```