---
type: "codesystem"
title: "Structure Map Target List Mode"
codesystem: "map-target-list-mode"
---
# Structure Map Target List Mode

- **Official URL**: http://hl7.org/fhir/map-target-list-mode
- **Version**: 6.0.0
- **Status**: active
- **Name**: StructureMapTargetListMode
- **Title**: Structure Map Target List Mode
- **Publisher**: HL7 (FHIR Project)
- **Description**: If field is a list, how to manage the production.
- **Case Sensitive**: true
- **Content**: complete

## Concepts

| Code | Display | Definition |
| --- | --- | --- |
| first | First | when the target list is being assembled, the items for this rule go first. If more than one rule defines a first item (for a given instance of mapping) then this is an error. |
| share | Share | the target instance is shared with the target instances generated by another rule (up to the first common n items, then create new ones). |
| last | Last | when the target list is being assembled, the items for this rule go last. If more than one rule defines a last item (for a given instance of mapping) then this is an error. |
| single | single | the target instance is shared with a number of target instances generated by another rule (up to the first common n items, then create new ones). |

## CodeSystem XML



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

<CodeSystem xmlns="http://hl7.org/fhir">
  <id value="map-target-list-mode"/>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-wg">
    <valueCode value="fhir"/>
  </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="2"/>
  </extension>
  <url value="http://hl7.org/fhir/map-target-list-mode"/>
  <identifier>
    <system value="urn:ietf:rfc:3986"/>
    <value value="urn:oid:2.16.840.1.113883.4.642.4.686"/>
  </identifier>
  <identifier>
    <use value="old"/>
    <system value="urn:ietf:rfc:3986"/>
    <value value="urn:oid:2.16.840.1.113883.4.642.1.672"/>
  </identifier>
  <version value="6.0.0"/>
  <name value="StructureMapTargetListMode"/>
  <title value="Structure Map Target List Mode"/>
  <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="If field is a list, how to manage the production."/>
  <caseSensitive value="true"/>
  <valueSet value="http://hl7.org/fhir/ValueSet/map-target-list-mode"/>
  <content value="complete"/>
  <concept>
    <code value="first"/>
    <display value="First"/>
    <definition value="when the target list is being assembled, the items for this rule go first. If more than one rule defines a first item (for a given instance of mapping) then this is an error."/>
  </concept>
  <concept>
    <code value="share"/>
    <display value="Share"/>
    <definition value="the target instance is shared with the target instances generated by another rule (up to the first common n items, then create new ones)."/>
  </concept>
  <concept>
    <code value="last"/>
    <display value="Last"/>
    <definition value="when the target list is being assembled, the items for this rule go last. If more than one rule defines a last item (for a given instance of mapping) then this is an error."/>
  </concept>
  <concept>
    <code value="single"/>
    <display value="single"/>
    <definition value="the target instance is shared with a number of target instances generated by another rule (up to the first common n items, then create new ones)."/>
  </concept>
</CodeSystem>
```