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

## : Kind of Quantity (2.8.1 - 1.0.0) - XML Representation

Active as of 2026-03-13

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    <CodeSystem xmlns="http://hl7.org/fhir">
      <id value="kindOfQuantity"/>
      <text>
        <status value="generated"/>
        <div xmlns="http://www.w3.org/1999/xhtml"><ul><li>Include all codes defined in <a href="CodeSystem-kindOfQuantity.html"><code>http://terminology.hl7.org/v2plusvocab/CodeSystem/kindOfQuantity</code></a></li></ul></div>
      </text>
      <extension
                 url="http://terminology.hl7.org/v2plusvocab/StructureDefinition/codesystem-v2versionCreated">
        <valueString value="2.8.1"/>
      </extension>
      <extension
                 url="http://terminology.hl7.org/v2plusvocab/StructureDefinition/codesystem-versionHistory">
        <valueString value="generate correct history somehow"/>
      </extension>
      <extension
                 url="http://terminology.hl7.org/v2plusvocab/StructureDefinition/codesystem-tableNo">
        <valueString value="0254"/>
      </extension>
      <url
           value="http://terminology.hl7.org/v2plusvocab/CodeSystem/kindOfQuantity"/>
      <identifier>
        <system value="urn:ietf:rfc:3986"/>
        <value value="urn:oid:2.16.840.1.113883.18.149"/>
      </identifier>
      <identifier>
        <system value="urn:ietf:rfc:3986"/>
        <value value="http://terminology.hl7.org/v2plusvocab/CodeSystem/v2-0254"/>
      </identifier>
      <version value="1.0.0"/>
      <name value="KindOfQuantity"/>
      <title value="Kind of Quantity (2.8.1 - 1.0.0)"/>
      <status value="active"/>
      <experimental value="true"/>
      <date value="2026-03-13T11:11:38+00:00"/>
      <publisher value="HL7/FO"/>
      <contact>
        <name value="HL7/FO"/>
        <telecom>
          <system value="url"/>
          <value value="http://www.hl7.org"/>
        </telecom>
      </contact>
      <description
                   value="HL7 published code system of concepts that describe categories of an underlying kind of property represented by an observation.  These are intended to distinguish concentrations from total amounts, molar concentrations from mass concentrations, partial pressures from colors, and so forth.  These are discussed more fully in the LOINC Users’ Manual.   These defined categories are derived from the approach described in 1995 edition of the IUPAC Silver Book.  These distinctions are used in IUPAC and LOINC standard codes.  Needs review by OO and HTA to determined if this is a value set built on LOINC part codes or some other external vocabulary."/>
      <copyright value="HL7 Inc., 2026"/>
      <caseSensitive value="true"/>
      <compositional value="false"/>
      <content value="complete"/>
      <property>
        <code value="versionIntroduced"/>
        <uri
             value="http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#versionIntroduced"/>
        <description value="version when was this code introduced"/>
        <type value="string"/>
      </property>
      <property>
        <code value="versionDeprecated"/>
        <uri
             value="http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#versionDeprecated"/>
        <description value="version when was this code deprecated"/>
        <type value="string"/>
      </property>
      <property>
        <code value="status"/>
        <uri value="http://hl7.org/fhir/concept-properties#status"/>
        <description
                     value="A code that indicates the status of the concept. Typical values are active, experimental, deprecated, and retired"/>
        <type value="code"/>
      </property>
      <property>
        <code value="comment"/>
        <uri
             value="http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#comment"/>
        <description
                     value="A string that provides additional detail pertinent to the use or understanding of the concept"/>
        <type value="string"/>
      </property>
      <property>
        <code value="usage"/>
        <uri
             value="http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#usage"/>
        <description value="usage notes for this code"/>
        <type value="string"/>
      </property>
      <property>
        <code value="modified"/>
        <uri
             value="http://terminology.hl7.org/v2plusvocab/CodeSystem/Property#modified"/>
        <description value="date of last modification"/>
        <type value="dateTime"/>
      </property>
      <concept>
        <code value="ABS"/>
        <display value="Absorbance"/>
        <definition value="Absorbance"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="ACNC"/>
        <display value="Concentration, Arbitrary Substance"/>
        <definition value="Concentration, Arbitrary Substance"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="ACT"/>
        <display value="Activity"/>
        <definition value="Activity"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="APER"/>
        <display value="Appearance"/>
        <definition value="Appearance"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="ARB"/>
        <display value="Arbitrary"/>
        <definition value="Arbitrary"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="AREA"/>
        <display value="Area"/>
        <definition value="Area"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="ASPECT"/>
        <display value="Aspect"/>
        <definition value="Aspect"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="CACT"/>
        <display value="Catalytic Activity"/>
        <definition value="Catalytic Activity"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="CCNT"/>
        <display value="Catalytic Content"/>
        <definition value="Catalytic Content"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="CCRTO"/>
        <display value="Catalytic Concentration Ratio"/>
        <definition value="Catalytic Concentration Ratio"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="CFR"/>
        <display value="Catalytic Fraction"/>
        <definition value="Catalytic Fraction"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="CLAS"/>
        <display value="Class"/>
        <definition value="Class"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="CNC"/>
        <display value="Catalytic Concentration"/>
        <definition value="Catalytic Concentration"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="CNST"/>
        <display value="Constant"/>
        <definition value="Constant"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="COEF"/>
        <display value="Coefficient"/>
        <definition value="Coefficient"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="COLOR"/>
        <display value="Color"/>
        <definition value="Color"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="CONS"/>
        <display value="Consistency"/>
        <definition value="Consistency"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="CRAT"/>
        <display value="Catalytic Rate"/>
        <definition value="Catalytic Rate"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="CRTO"/>
        <display value="Catalytic Ratio"/>
        <definition value="Catalytic Ratio"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="DEN"/>
        <display value="Density"/>
        <definition value="Density"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="DEV"/>
        <display value="Device"/>
        <definition value="Device"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="DIFF"/>
        <display value="Difference"/>
        <definition value="Difference"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="ELAS"/>
        <display value="Elasticity"/>
        <definition value="Elasticity"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="ELPOT"/>
        <display value="Electrical Potential (Voltage)"/>
        <definition value="Electrical Potential (Voltage)"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="ELRAT"/>
        <display value="Electrical current (amperage)"/>
        <definition value="Electrical current (amperage)"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="ELRES"/>
        <display value="Electrical Resistance"/>
        <definition value="Electrical Resistance"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="ENGR"/>
        <display value="Energy"/>
        <definition value="Energy"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="ENT"/>
        <display value="Entitic"/>
        <definition value="Entitic"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="ENTCAT"/>
        <display value="Entitic Catalytic Activity"/>
        <definition value="Entitic Catalytic Activity"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="ENTNUM"/>
        <display value="Entitic Number"/>
        <definition value="Entitic Number"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="ENTSUB"/>
        <display value="Entitic Substance of Amount"/>
        <definition value="Entitic Substance of Amount"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="ENTVOL"/>
        <display value="Entitic Volume"/>
        <definition value="Entitic Volume"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="EQL"/>
        <display value="Equilibrium"/>
        <definition value="Equilibrium"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="FORCE"/>
        <display value="Mechanical force"/>
        <definition value="Mechanical force"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="FREQ"/>
        <display value="Frequency"/>
        <definition value="Frequency"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="IMP"/>
        <display value="Impression/ interpretation of study"/>
        <definition value="Impression/ interpretation of study"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="KINV"/>
        <display value="Kinematic Viscosity"/>
        <definition value="Kinematic Viscosity"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="LEN"/>
        <display value="Length"/>
        <definition value="Length"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="LINC"/>
        <display value="Length Increment"/>
        <definition value="Length Increment"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="LIQ"/>
        <display value="Liquefaction"/>
        <definition value="Liquefaction"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="MASS"/>
        <display value="Mass"/>
        <definition value="Mass"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="MCNC"/>
        <display value="Mass Concentration"/>
        <definition value="Mass Concentration"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="MCNT"/>
        <display value="Mass Content"/>
        <definition value="Mass Content"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="MCRTO"/>
        <display value="Mass Concentration Ratio"/>
        <definition value="Mass Concentration Ratio"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="MFR"/>
        <display value="Mass Fraction"/>
        <definition value="Mass Fraction"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="MGFLUX"/>
        <display value="Magnetic flux"/>
        <definition value="Magnetic flux"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="MINC"/>
        <display value="Mass Increment"/>
        <definition value="Mass Increment"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="MORPH"/>
        <display value="Morphology"/>
        <definition value="Morphology"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="MOTIL"/>
        <display value="Motility"/>
        <definition value="Motility"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="MRAT"/>
        <display value="Mass Rate"/>
        <definition value="Mass Rate"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="MRTO"/>
        <display value="Mass Ratio"/>
        <definition value="Mass Ratio"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="NCNC"/>
        <display value="Number Concentration"/>
        <definition value="Number Concentration"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="NCNT"/>
        <display value="Number Content"/>
        <definition value="Number Content"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="NFR"/>
        <display value="Number Fraction"/>
        <definition value="Number Fraction"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="NRTO"/>
        <display value="Number Ratio"/>
        <definition value="Number Ratio"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="NUM"/>
        <display value="Number"/>
        <definition value="Number"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="OD"/>
        <display value="Optical density"/>
        <definition value="Optical density"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="OSMOL"/>
        <display value="Osmolality"/>
        <definition value="Osmolality"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="PRES"/>
        <display value="Pressure (Partial)"/>
        <definition value="Pressure (Partial)"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="PRID"/>
        <display value="Presence/Identity/Existence"/>
        <definition value="Presence/Identity/Existence"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="PWR"/>
        <display value="Power (wattage)"/>
        <definition value="Power (wattage)"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="RANGE"/>
        <display value="Ranges"/>
        <definition value="Ranges"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="RATIO"/>
        <display value="Ratios"/>
        <definition value="Ratios"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="RCRLTM"/>
        <display value="Reciprocal Relative Time"/>
        <definition value="Reciprocal Relative Time"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="RDEN"/>
        <display value="Relative Density"/>
        <definition value="Relative Density"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="REL"/>
        <display value="Relative"/>
        <definition value="Relative"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="RLMCNC"/>
        <display value="Relative Mass Concentration"/>
        <definition value="Relative Mass Concentration"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="RLSCNC"/>
        <display value="Relative Substance Concentration"/>
        <definition value="Relative Substance Concentration"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="RLTM"/>
        <display value="Relative Time"/>
        <definition value="Relative Time"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="SATFR"/>
        <display value="Saturation Fraction"/>
        <definition value="Saturation Fraction"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="SCNC"/>
        <display value="Substance Concentration"/>
        <definition value="Substance Concentration"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="SCNCIN"/>
        <display value="Substance Concentration Increment"/>
        <definition value="Substance Concentration Increment"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="SCNT"/>
        <display value="Substance Content"/>
        <definition value="Substance Content"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="SCNTR"/>
        <display value="Substance Content Rate"/>
        <definition value="Substance Content Rate"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="SCRTO"/>
        <display value="Substance Concentration Ratio"/>
        <definition value="Substance Concentration Ratio"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="SFR"/>
        <display value="Substance Fraction"/>
        <definition value="Substance Fraction"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="SHAPE"/>
        <display value="Shape"/>
        <definition value="Shape"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="SMELL"/>
        <display value="Smell"/>
        <definition value="Smell"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="SRAT"/>
        <display value="Substance Rate"/>
        <definition value="Substance Rate"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="SRTO"/>
        <display value="Substance Ratio"/>
        <definition value="Substance Ratio"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="SUB"/>
        <display value="Substance Amount"/>
        <definition value="Substance Amount"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="SUSC"/>
        <display value="Susceptibility"/>
        <definition value="Susceptibility"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="TASTE"/>
        <display value="Taste"/>
        <definition value="Taste"/>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="TEMP"/>
        <display value="Temperature"/>
        <definition value="Temperature"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="TEMPDF"/>
        <display value="Temperature Difference"/>
        <definition value="Temperature Difference"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="TEMPIN"/>
        <display value="Temperature Increment"/>
        <definition value="Temperature Increment"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="THRMCNC"/>
        <display value="Threshold Mass Concentration"/>
        <definition value="Threshold Mass Concentration"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="THRSCNC"/>
        <display value="Threshold Substance Concentration"/>
        <definition value="Threshold Substance Concentration"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="TIME"/>
        <display value="Time (e.g. seconds)"/>
        <definition value="Time (e.g. seconds)"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="TITR"/>
        <display value="Dilution Factor (Titer)"/>
        <definition value="Dilution Factor (Titer)"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="TMDF"/>
        <display value="Time Difference"/>
        <definition value="Time Difference"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="TMSTP"/>
        <display value="Time Stamp-Date and Time"/>
        <definition value="Time Stamp-Date and Time"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="TRTO"/>
        <display value="Time Ratio"/>
        <definition value="Time Ratio"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="TYPE"/>
        <display value="Type"/>
        <definition value="Type"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="VCNT"/>
        <display value="Volume Content"/>
        <definition value="Volume Content"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="VEL"/>
        <display value="Velocity"/>
        <definition value="Velocity"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="VELRT"/>
        <display value="Velocity Ratio"/>
        <definition value="Velocity Ratio"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="VFR"/>
        <display value="Volume Fraction"/>
        <definition value="Volume Fraction"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="VISC"/>
        <display value="Viscosity"/>
        <definition value="Viscosity"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="VOL"/>
        <display value="Volume"/>
        <definition value="Volume"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="VRAT"/>
        <display value="Volume Rate"/>
        <definition value="Volume Rate"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
      <concept>
        <code value="VRTO"/>
        <display value="Volume Ratio"/>
        <definition value="Volume Ratio"/>
        <property>
          <code value="usage"/>
          <valueString
                       value="Adopted from the IUPAC Silver Book 1995” to the code"/>
        </property>
        <property>
          <code value="modified"/>
          <valueDateTime value="2015-08-21"/>
        </property>
        <property>
          <code value="versionIntroduced"/>
          <valueString value="2.3"/>
        </property>
      </concept>
    </CodeSystem>