---
type: "codesystem"
title: "Observation Data Type"
codesystem: "permitted-data-type"
---
# Observation Data Type

- **Official URL**: http://hl7.org/fhir/permitted-data-type
- **Version**: 6.0.0
- **Status**: active
- **Name**: ObservationDataType
- **Title**: Observation Data Type
- **Publisher**: HL7 (FHIR Project)
- **Description**: Permitted data type for observation value.
- **Case Sensitive**: true
- **Content**: complete

## Concepts

| Code | Display | Definition |
| --- | --- | --- |
| Quantity | Quantity | A measured amount. |
| CodeableConcept | CodeableConcept | A coded concept from a reference terminology and/or text. |
| string | string | A sequence of Unicode characters. |
| boolean | boolean | true or false. |
| integer | integer | A signed integer. |
| Range | Range | A set of values bounded by low and high. |
| Ratio | Ratio | A ratio of two Quantity values - a numerator and a denominator. |
| SampledData | SampledData | A series of measurements taken by a device. |
| time | time | A time during the day, in the format hh:mm:ss. |
| dateTime | dateTime | A date, date-time or partial date (e.g. just year or year + month) as used in human communication. |
| Period | Period | A time range defined by start and end date/time. |

## CodeSystem XML



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

<CodeSystem xmlns="http://hl7.org/fhir">
  <id value="permitted-data-type"/>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-wg">
    <valueCode value="oo"/>
  </extension>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status">
    <valueCode value="normative"/>
  </extension>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm">
    <valueInteger value="1"/>
  </extension>
  <url value="http://hl7.org/fhir/permitted-data-type"/>
  <identifier>
    <system value="urn:ietf:rfc:3986"/>
    <value value="urn:oid:2.16.840.1.113883.4.642.4.1332"/>
  </identifier>
  <version value="6.0.0"/>
  <name value="ObservationDataType"/>
  <title value="Observation Data Type"/>
  <status value="active"/>
  <experimental value="false"/>
  <date value="2021-01-05T10:01:24+11:00"/>
  <publisher value="HL7 (FHIR Project)"/>
  <contact>
    <telecom>
      <system value="url"/>
      <value value="http://hl7.org/fhir"/>
    </telecom>
    <telecom>
      <system value="email"/>
      <value value="fhir@lists.hl7.org"/>
    </telecom>
  </contact>
  <description value="Permitted data type for observation value."/>
  <caseSensitive value="true"/>
  <valueSet value="http://hl7.org/fhir/ValueSet/permitted-data-type"/>
  <content value="complete"/>
  <concept>
    <code value="Quantity"/>
    <display value="Quantity"/>
    <definition value="A measured amount."/>
  </concept>
  <concept>
    <code value="CodeableConcept"/>
    <display value="CodeableConcept"/>
    <definition value="A coded concept from a reference terminology and/or text."/>
  </concept>
  <concept>
    <code value="string"/>
    <display value="string"/>
    <definition value="A sequence of Unicode characters."/>
  </concept>
  <concept>
    <code value="boolean"/>
    <display value="boolean"/>
    <definition value="true or false."/>
  </concept>
  <concept>
    <code value="integer"/>
    <display value="integer"/>
    <definition value="A signed integer."/>
  </concept>
  <concept>
    <code value="Range"/>
    <display value="Range"/>
    <definition value="A set of values bounded by low and high."/>
  </concept>
  <concept>
    <code value="Ratio"/>
    <display value="Ratio"/>
    <definition value="A ratio of two Quantity values - a numerator and a denominator."/>
  </concept>
  <concept>
    <code value="SampledData"/>
    <display value="SampledData"/>
    <definition value="A series of measurements taken by a device."/>
  </concept>
  <concept>
    <code value="time"/>
    <display value="time"/>
    <definition value="A time during the day, in the format hh:mm:ss."/>
  </concept>
  <concept>
    <code value="dateTime"/>
    <display value="dateTime"/>
    <definition value="A date, date-time or partial date (e.g. just year or year + month) as used in human communication."/>
  </concept>
  <concept>
    <code value="Period"/>
    <display value="Period"/>
    <definition value="A time range defined by start and end date/time."/>
  </concept>
</CodeSystem>
```