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

<NamingSystem xmlns="http://hl7.org/fhir">
  <id value="UNII"/>
  <text>
    <status value="generated"/><div xmlns="http://www.w3.org/1999/xhtml"><h3>Summary</h3><table class="grid"><tr><td>Defining URL</td><td>http://terminology.hl7.org/NamingSystem/UNII</td></tr><tr><td>Version</td><td>1.0.0</td></tr><tr><td>Name</td><td>UNII</td></tr><tr><td>Title</td><td>Unique Ingredient Identifier (UNII)</td></tr><tr><td>Status</td><td>active</td></tr><tr><td>Definition</td><td><div><p>A UNII is a non-proprietary, free, unique, unambiguous, nonsemantic, alphanumeric identifier based on a substance's molecular structure and/or descriptive information. UNII identifiers are generated based on scientific identity characteristics using ISO 11238 data elements. UNII availability does not imply any regulatory review or approval. Synonyms and mappings are based on the best public information available at the time of publication.</p>
</div></td></tr><tr><td>Publisher</td><td>U.S. Food and Drug Administration (FDA)</td></tr></table><h3>Identifiers</h3><table class="grid"><tr><td><b>Type</b></td><td><b>Value</b></td><td><b>Preferred</b></td></tr><tr><td>OID</td><td>2.16.840.1.113883.4.9</td><td>true</td></tr><tr><td>URI</td><td>http://fdasis.nlm.nih.gov</td><td>true</td></tr></table></div>
  </text>
  <extension url="http://hl7.org/fhir/5.0/StructureDefinition/extension-NamingSystem.url">
    <valueUri value="http://terminology.hl7.org/NamingSystem/UNII"/>
  </extension>
  <extension url="http://hl7.org/fhir/5.0/StructureDefinition/extension-NamingSystem.version">
    <valueString value="1.0.0"/>
  </extension>
  <extension url="http://hl7.org/fhir/5.0/StructureDefinition/extension-NamingSystem.title">
    <valueString value="Unique Ingredient Identifier (UNII)"/>
  </extension>
  <name value="UNII"/>
  <status value="active"/>
  <kind value="codesystem"/>
  <date value="2022-08-23T00:00:00-00:00"/>
  <publisher value="U.S. Food and Drug Administration (FDA)"/>
  <contact>
    <name value="U.S. Food and Drug Administration (FDA)"/>
    <telecom>
      <system value="url"/>
      <value value="https://www.fda.gov/"/>
    </telecom>
  </contact>
  <responsible value="U.S. Food and Drug Administration (FDA)"/>
  <description value="A UNII is a non-proprietary, free, unique, unambiguous, nonsemantic, alphanumeric identifier based on a substance's molecular structure and/or descriptive information. UNII identifiers are generated based on scientific identity characteristics using ISO 11238 data elements. UNII availability does not imply any regulatory review or approval. Synonyms and mappings are based on the best public information available at the time of publication."/>
  <uniqueId>
    <type value="oid"/>
    <value value="2.16.840.1.113883.4.9"/>
    <preferred value="true"/>
  </uniqueId>
  <uniqueId>
    <type value="uri"/>
    <value value="http://fdasis.nlm.nih.gov"/>
    <preferred value="true"/>
  </uniqueId>
</NamingSystem>