FHIR to OMOP FHIR IG
2.0.0-ballot - STU 1 Ballot International flag

FHIR to OMOP FHIR IG, published by HL7 International / Biomedical Research and Regulation. This guide is not an authorized publication; it is the continuous build for version 2.0.0-ballot built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/fhir-omop-ig/ and changes regularly. See the Directory of published versions

Logical Model: Drug Era OMOP Table - XML Profile

Page standards status: Trial-use Maturity Level: 2

XML representation of the DrugEra logical model.

Raw xml | Download


<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="DrugEra"/>
  <language value="en"/>
  <text>
    <status value="extensions"/>
    <div xmlns="http://www.w3.org/1999/xhtml"><p class="res-header-id"><b>Generated Narrative: StructureDefinition DrugEra</b></p><table border="0" cellpadding="0" cellspacing="0" class="xhtTableBorder0"><tr class="xhtRowBorder1"><th scope="col" style="" class="hierarchy xhtCellBorder0"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="The logical name of the element">Name</a></th><th scope="col" style="" class="hierarchy xhtCellBorder0"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Information about the use of the element">Flags</a></th><th scope="col" style="" class="hierarchy xhtCellBorder0"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Minimum and Maximum # of times the element can appear in the instance">Card.</a></th><th scope="col" style="; width: 100px" class="hierarchy xhtCellBorder0"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Reference to the type of the element">Type</a></th><th scope="col" style="" class="hierarchy xhtCellBorder0"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Additional information about the element">Description &amp; Constraints</a><span style="float: right"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Legend for this format"><img src="data:image/png;base64,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" alt="doco" style="background-color: inherit"/></a></span></th></tr><tr class="xhtRowBorder0 xhtRowEven"><td style="background-image: url(tbl_bck1.png)" class="hierarchy xhtCellBorder0 xhtCellNoWrap"><img src="tbl_spacer.png" alt="" style="background-color: inherit" class="hierarchy"/><img src="icon_element.gif" alt="" style="background-color: white; background-color: inherit" title="Element" class="hierarchy"/> <a href="StructureDefinition-DrugEra-definitions.html#DrugEra" title="A Drug Era is defined as a span of time when the Person is assumed to be exposed to a particular active ingredient. A Drug Era is not the same as a Drug Exposure: Exposures are individual records corresponding to the source when Drug was delivered to the Person, while successive periods of Drug Exposures are combined under certain rules to produce continuous Drug Eras.">DrugEra</a><a name="DrugEra"> </a></td><td style="" class="hierarchy xhtCellBorder0"/><td style="" class="hierarchy xhtCellBorder0"><span class="xhtPieceDeEmphasized">0</span><span class="xhtPieceDeEmphasized">..</span><span class="xhtPieceDeEmphasized">*</span></td><td style="" class="hierarchy xhtCellBorder0"><a href="http://hl7.org/fhir/R5/types.html#Base">Base</a></td><td style="" class="hierarchy xhtCellBorder0">Drug Era OMOP Table<br/><span class="xhtPieceBold">Instances of this type can be the target of a Reference</span></td></tr>
<tr class="xhtRowBorder0 xhtRowOdd"><td style="background-image: url(tbl_bck10.png)" class="hierarchy xhtCellBorder0 xhtCellNoWrap"><img src="tbl_spacer.png" alt="" style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin.png" alt="" style="background-color: inherit" class="hierarchy"/><img src="icon_primitive.png" alt="" style="background-color: #F7F7F7; background-color: inherit" title="Primitive Data Type" class="hierarchy"/> <span style="position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0" class="sr-only">DrugEra.</span><a href="StructureDefinition-DrugEra-definitions.html#DrugEra.drug-era-id" title="Drug Era Identifier">drug_era_id</a><a name="DrugEra.drug-era-id"> </a></td><td style="" class="hierarchy xhtCellBorder0"/><td style="" class="hierarchy xhtCellBorder0">1..1</td><td style="" class="hierarchy xhtCellBorder0"><a href="http://hl7.org/fhir/R5/datatypes.html#code">code</a></td><td style="" class="hierarchy xhtCellBorder0">Drug Era Identifier</td></tr>
<tr class="xhtRowBorder0 xhtRowEven"><td style="background-image: url(tbl_bck10.png)" class="hierarchy xhtCellBorder0 xhtCellNoWrap"><img src="tbl_spacer.png" alt="" style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin.png" alt="" style="background-color: inherit" class="hierarchy"/><img src="icon_primitive.png" alt="" style="background-color: white; background-color: inherit" title="Primitive Data Type" class="hierarchy"/> <span style="position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0" class="sr-only">DrugEra.</span><a href="StructureDefinition-DrugEra-definitions.html#DrugEra.person-id" title="Person">person_id</a><a name="DrugEra.person-id"> </a></td><td style="" class="hierarchy xhtCellBorder0"/><td style="" class="hierarchy xhtCellBorder0">1..1</td><td style="" class="hierarchy xhtCellBorder0"><a href="http://hl7.org/fhir/R5/datatypes.html#integer">integer</a></td><td style="" class="hierarchy xhtCellBorder0">Person</td></tr>
<tr class="xhtRowBorder0 xhtRowOdd"><td style="background-image: url(tbl_bck10.png)" class="hierarchy xhtCellBorder0 xhtCellNoWrap"><img src="tbl_spacer.png" alt="" style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin.png" alt="" style="background-color: inherit" class="hierarchy"/><img src="icon_primitive.png" alt="" style="background-color: #F7F7F7; background-color: inherit" title="Primitive Data Type" class="hierarchy"/> <span style="position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0" class="sr-only">DrugEra.</span><a href="StructureDefinition-DrugEra-definitions.html#DrugEra.drug-concept-id" title="The Concept Id representing the specific drug ingredient.">drug_concept_id</a><a name="DrugEra.drug-concept-id"> </a></td><td style="" class="hierarchy xhtCellBorder0"/><td style="" class="hierarchy xhtCellBorder0">1..1</td><td style="" class="hierarchy xhtCellBorder0"><a href="http://hl7.org/fhir/R5/datatypes.html#code">code</a></td><td style="" class="hierarchy xhtCellBorder0">Drug</td></tr>
<tr class="xhtRowBorder0 xhtRowEven"><td style="background-image: url(tbl_bck10.png)" class="hierarchy xhtCellBorder0 xhtCellNoWrap"><img src="tbl_spacer.png" alt="" style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin.png" alt="" style="background-color: inherit" class="hierarchy"/><img src="icon_primitive.png" alt="" style="background-color: white; background-color: inherit" title="Primitive Data Type" class="hierarchy"/> <span style="position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0" class="sr-only">DrugEra.</span><a href="StructureDefinition-DrugEra-definitions.html#DrugEra.drug-era-start-date" title="Drug Era Start Date">drug_era_start_date</a><a name="DrugEra.drug-era-start-date"> </a></td><td style="" class="hierarchy xhtCellBorder0"/><td style="" class="hierarchy xhtCellBorder0">1..1</td><td style="" class="hierarchy xhtCellBorder0"><a href="http://hl7.org/fhir/R5/datatypes.html#date">date</a></td><td style="" class="hierarchy xhtCellBorder0">Drug Era Start Date</td></tr>
<tr class="xhtRowBorder0 xhtRowOdd"><td style="background-image: url(tbl_bck10.png)" class="hierarchy xhtCellBorder0 xhtCellNoWrap"><img src="tbl_spacer.png" alt="" style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin.png" alt="" style="background-color: inherit" class="hierarchy"/><img src="icon_primitive.png" alt="" style="background-color: #F7F7F7; background-color: inherit" title="Primitive Data Type" class="hierarchy"/> <span style="position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0" class="sr-only">DrugEra.</span><a href="StructureDefinition-DrugEra-definitions.html#DrugEra.drug-era-end-date" title="Drug Era End Date">drug_era_end_date</a><a name="DrugEra.drug-era-end-date"> </a></td><td style="" class="hierarchy xhtCellBorder0"/><td style="" class="hierarchy xhtCellBorder0">1..1</td><td style="" class="hierarchy xhtCellBorder0"><a href="http://hl7.org/fhir/R5/datatypes.html#date">date</a></td><td style="" class="hierarchy xhtCellBorder0">Drug Era End Date</td></tr>
<tr class="xhtRowBorder0 xhtRowEven"><td style="background-image: url(tbl_bck10.png)" class="hierarchy xhtCellBorder0 xhtCellNoWrap"><img src="tbl_spacer.png" alt="" style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin.png" alt="" style="background-color: inherit" class="hierarchy"/><img src="icon_primitive.png" alt="" style="background-color: white; background-color: inherit" title="Primitive Data Type" class="hierarchy"/> <span style="position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0" class="sr-only">DrugEra.</span><a href="StructureDefinition-DrugEra-definitions.html#DrugEra.drug-exposure-count" title="Drug Exposure Count">drug_exposure_count</a><a name="DrugEra.drug-exposure-count"> </a></td><td style="" class="hierarchy xhtCellBorder0"/><td style="" class="hierarchy xhtCellBorder0">0..1</td><td style="" class="hierarchy xhtCellBorder0"><a href="http://hl7.org/fhir/R5/datatypes.html#integer">integer</a></td><td style="" class="hierarchy xhtCellBorder0">Drug Exposure Count</td></tr>
<tr class="xhtRowBorder0 xhtRowOdd"><td style="background-image: url(tbl_bck00.png)" class="hierarchy xhtCellBorder0 xhtCellNoWrap"><img src="tbl_spacer.png" alt="" style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin_end.png" alt="" style="background-color: inherit" class="hierarchy"/><img src="icon_primitive.png" alt="" style="background-color: #F7F7F7; background-color: inherit" title="Primitive Data Type" class="hierarchy"/> <span style="position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0" class="sr-only">DrugEra.</span><a href="StructureDefinition-DrugEra-definitions.html#DrugEra.gap-days" title="Gap Days">gap_days</a><a name="DrugEra.gap-days"> </a></td><td style="" class="hierarchy xhtCellBorder0"/><td style="" class="hierarchy xhtCellBorder0">0..1</td><td style="" class="hierarchy xhtCellBorder0"><a href="http://hl7.org/fhir/R5/datatypes.html#integer">integer</a></td><td style="" class="hierarchy xhtCellBorder0">Gap Days</td></tr>
<tr><td colspan="5" class="hierarchy"><br/><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Legend for this format"><img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABmJLR0QA/wD/AP+gvaeTAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB3RJTUUH3goXBCwdPqAP0wAAAldJREFUOMuNk0tIlFEYhp9z/vE2jHkhxXA0zJCMitrUQlq4lnSltEqCFhFG2MJFhIvIFpkEWaTQqjaWZRkp0g26URZkTpbaaOJkDqk10szoODP//7XIMUe0elcfnPd9zsfLOYplGrpRwZaqTtw3K7PtGem7Q6FoidbGgqHVy/HRb669R+56zx7eRV1L31JGxYbBtjKK93cxeqfyQHbehkZbUkK20goELEuIzEd+dHS+qz/Y8PTSif0FnGkbiwcAjHaU1+QWOptFiyCLp/LnKptpqIuXHx6rbR26kJcBX3yLgBfnd7CxwJmflpP2wUg0HIAoUUpZBmKzELGWcN8nAr6Gpu7tLU/CkwAaoKTWRSQyt89Q8w6J+oVQkKnBoblH7V0PPvUOvDYXfopE/SJmALsxnVm6LbkotrUtNowMeIrVrBcBpaMmdS0j9df7abpSuy7HWehwJdt1lhVwi/J58U5beXGAF6c3UXLycw1wdFklArBn87xdh0ZsZtArghBdAA3+OEDVubG4UEzP6x1FOWneHh2VDAHBAt80IbdXDcesNoCvs3E5AFyNSU5nbrDPZpcUEQQTFZiEVx+51fxMhhyJEAgvlriadIJZZksRuwBYMOPBbO3hePVVqgEJhFeUuFLhIPkRP6BQLIBrmMenujm/3g4zc398awIe90Zb5A1vREALqneMcYgP/xVQWlG+Ncu5vgwwlaUNx+3799rfe96u9K0JSDXcOzOTJg4B6IgmXfsygc7/Bvg9g9E58/cDVmGIBOP/zT8Bz1zqWqpbXIsd0O9hajXfL6u4BaOS6SeWAAAAAElFTkSuQmCC" alt="doco" style="background-color: inherit"/> Documentation for this format</a></td></tr></table></div>
  </text>
  <extension
             url="http://hl7.org/fhir/StructureDefinition/structuredefinition-type-characteristics">
    <valueCode value="can-be-target"/>
  </extension>
  <extension
             url="http://hl7.org/fhir/StructureDefinition/structuredefinition-wg">
    <valueCode value="brr"/>
  </extension>
  <extension
             url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm">
    <valueInteger value="2">
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom">
        <valueCanonical
                        value="http://hl7.org/fhir/uv/omop/ImplementationGuide/hl7.fhir.uv.omop"/>
      </extension>
    </valueInteger>
  </extension>
  <extension
             url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status">
    <valueCode value="trial-use">
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom">
        <valueCanonical
                        value="http://hl7.org/fhir/uv/omop/ImplementationGuide/hl7.fhir.uv.omop"/>
      </extension>
    </valueCode>
  </extension>
  <url value="http://hl7.org/fhir/uv/omop/StructureDefinition/DrugEra"/>
  <identifier>
    <system value="urn:ietf:rfc:3986"/>
    <value value="urn:oid:2.16.840.1.113883.4.642.40.77.42.8"/>
  </identifier>
  <version value="2.0.0-ballot"/>
  <name value="DrugEra"/>
  <title value="Drug Era OMOP Table"/>
  <status value="active"/>
  <date value="2026-11-06T00:33:48+00:00"/>
  <publisher value="HL7 International / Biomedical Research and Regulation"/>
  <contact>
    <name value="HL7 International / Biomedical Research and Regulation"/>
    <telecom>
      <system value="url"/>
      <value value="http://www.hl7.org/Special/committees/rcrim"/>
    </telecom>
  </contact>
  <description
               value="A Drug Era is defined as a span of time when the Person is assumed to be exposed to a particular active ingredient. A Drug Era is not the same as a Drug Exposure: Exposures are individual records corresponding to the source when Drug was delivered to the Person, while successive periods of Drug Exposures are combined under certain rules to produce continuous Drug Eras."/>
  <jurisdiction>
    <coding>
      <system value="http://unstats.un.org/unsd/methods/m49/m49.htm"/>
      <code value="001"/>
      <display value="World"/>
    </coding>
  </jurisdiction>
  <fhirVersion value="5.0.0"/>
  <mapping>
    <identity value="rim"/>
    <uri value="http://hl7.org/v3"/>
    <name value="RIM Mapping"/>
  </mapping>
  <kind value="logical"/>
  <abstract value="false"/>
  <type value="http://hl7.org/fhir/uv/omop/StructureDefinition/DrugEra"/>
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Base"/>
  <derivation value="specialization"/>
  <snapshot>
    <extension
               url="http://hl7.org/fhir/tools/StructureDefinition/snapshot-base-version">
      <valueString value="5.0.0"/>
    </extension>
    <element id="DrugEra">
      <path value="DrugEra"/>
      <short value="Drug Era OMOP Table"/>
      <definition
                  value="A Drug Era is defined as a span of time when the Person is assumed to be exposed to a particular active ingredient. A Drug Era is not the same as a Drug Exposure: Exposures are individual records corresponding to the source when Drug was delivered to the Person, while successive periods of Drug Exposures are combined under certain rules to produce continuous Drug Eras."/>
      <min value="0"/>
      <max value="*"/>
      <base>
        <path value="Base"/>
        <min value="0"/>
        <max value="*"/>
      </base>
      <isModifier value="false"/>
      <mapping>
        <identity value="rim"/>
        <map value="n/a"/>
      </mapping>
    </element>
    <element id="DrugEra.drug-era-id">
      <path value="DrugEra.drug_era_id"/>
      <short value="Drug Era Identifier"/>
      <definition value="Drug Era Identifier"/>
      <min value="1"/>
      <max value="1"/>
      <base>
        <path value="DrugEra.drug_era_id"/>
        <min value="1"/>
        <max value="1"/>
      </base>
      <type>
        <code value="code"/>
      </type>
    </element>
    <element id="DrugEra.person-id">
      <path value="DrugEra.person_id"/>
      <short value="Person"/>
      <definition value="Person"/>
      <min value="1"/>
      <max value="1"/>
      <base>
        <path value="DrugEra.person_id"/>
        <min value="1"/>
        <max value="1"/>
      </base>
      <type>
        <code value="integer"/>
      </type>
    </element>
    <element id="DrugEra.drug-concept-id">
      <path value="DrugEra.drug_concept_id"/>
      <short value="Drug"/>
      <definition
                  value="The Concept Id representing the specific drug ingredient."/>
      <min value="1"/>
      <max value="1"/>
      <base>
        <path value="DrugEra.drug_concept_id"/>
        <min value="1"/>
        <max value="1"/>
      </base>
      <type>
        <code value="code"/>
      </type>
    </element>
    <element id="DrugEra.drug-era-start-date">
      <path value="DrugEra.drug_era_start_date"/>
      <short value="Drug Era Start Date"/>
      <definition value="Drug Era Start Date"/>
      <min value="1"/>
      <max value="1"/>
      <base>
        <path value="DrugEra.drug_era_start_date"/>
        <min value="1"/>
        <max value="1"/>
      </base>
      <type>
        <code value="date"/>
      </type>
    </element>
    <element id="DrugEra.drug-era-end-date">
      <path value="DrugEra.drug_era_end_date"/>
      <short value="Drug Era End Date"/>
      <definition value="Drug Era End Date"/>
      <min value="1"/>
      <max value="1"/>
      <base>
        <path value="DrugEra.drug_era_end_date"/>
        <min value="1"/>
        <max value="1"/>
      </base>
      <type>
        <code value="date"/>
      </type>
    </element>
    <element id="DrugEra.drug-exposure-count">
      <path value="DrugEra.drug_exposure_count"/>
      <short value="Drug Exposure Count"/>
      <definition value="Drug Exposure Count"/>
      <min value="0"/>
      <max value="1"/>
      <base>
        <path value="DrugEra.drug_exposure_count"/>
        <min value="0"/>
        <max value="1"/>
      </base>
      <type>
        <code value="integer"/>
      </type>
    </element>
    <element id="DrugEra.gap-days">
      <path value="DrugEra.gap_days"/>
      <short value="Gap Days"/>
      <definition value="Gap Days"/>
      <min value="0"/>
      <max value="1"/>
      <base>
        <path value="DrugEra.gap_days"/>
        <min value="0"/>
        <max value="1"/>
      </base>
      <type>
        <code value="integer"/>
      </type>
    </element>
  </snapshot>
  <differential>
    <element id="DrugEra">
      <path value="DrugEra"/>
      <short value="Drug Era OMOP Table"/>
      <definition
                  value="A Drug Era is defined as a span of time when the Person is assumed to be exposed to a particular active ingredient. A Drug Era is not the same as a Drug Exposure: Exposures are individual records corresponding to the source when Drug was delivered to the Person, while successive periods of Drug Exposures are combined under certain rules to produce continuous Drug Eras."/>
    </element>
    <element id="DrugEra.drug-era-id">
      <path value="DrugEra.drug_era_id"/>
      <short value="Drug Era Identifier"/>
      <definition value="Drug Era Identifier"/>
      <min value="1"/>
      <max value="1"/>
      <type>
        <code value="code"/>
      </type>
    </element>
    <element id="DrugEra.person-id">
      <path value="DrugEra.person_id"/>
      <short value="Person"/>
      <definition value="Person"/>
      <min value="1"/>
      <max value="1"/>
      <type>
        <code value="integer"/>
      </type>
    </element>
    <element id="DrugEra.drug-concept-id">
      <path value="DrugEra.drug_concept_id"/>
      <short value="Drug"/>
      <definition
                  value="The Concept Id representing the specific drug ingredient."/>
      <min value="1"/>
      <max value="1"/>
      <type>
        <code value="code"/>
      </type>
    </element>
    <element id="DrugEra.drug-era-start-date">
      <path value="DrugEra.drug_era_start_date"/>
      <short value="Drug Era Start Date"/>
      <definition value="Drug Era Start Date"/>
      <min value="1"/>
      <max value="1"/>
      <type>
        <code value="date"/>
      </type>
    </element>
    <element id="DrugEra.drug-era-end-date">
      <path value="DrugEra.drug_era_end_date"/>
      <short value="Drug Era End Date"/>
      <definition value="Drug Era End Date"/>
      <min value="1"/>
      <max value="1"/>
      <type>
        <code value="date"/>
      </type>
    </element>
    <element id="DrugEra.drug-exposure-count">
      <path value="DrugEra.drug_exposure_count"/>
      <short value="Drug Exposure Count"/>
      <definition value="Drug Exposure Count"/>
      <min value="0"/>
      <max value="1"/>
      <type>
        <code value="integer"/>
      </type>
    </element>
    <element id="DrugEra.gap-days">
      <path value="DrugEra.gap_days"/>
      <short value="Gap Days"/>
      <definition value="Gap Days"/>
      <min value="0"/>
      <max value="1"/>
      <type>
        <code value="integer"/>
      </type>
    </element>
  </differential>
</StructureDefinition>