<?xml version="1.0" encoding="UTF-8"?>
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  Generated on Tue, Sep 30, 2014 18:08+1000 for FHIR v0.0.82 
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<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns="http://hl7.org/fhir" xmlns:xhtml="http://www.w3.org/1999/xhtml" targetNamespace="http://hl7.org/fhir" elementFormDefault="qualified" version="0.0.82">
  <xs:include schemaLocation="fhir-base.xsd"/>
  <xs:element name="Substance" type="Substance">
    <xs:annotation>
      <xs:documentation>A homogeneous material with a definite composition.</xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name="Substance">
    <xs:annotation>
      <xs:documentation>A homogeneous material with a definite composition.</xs:documentation>
      <xs:documentation>If the element is present, it must have either a @value, an @id, or extensions</xs:documentation>
    </xs:annotation>
    <xs:complexContent>
      <xs:extension base="Resource">
        <xs:sequence>
          <xs:element name="type" minOccurs="1" maxOccurs="1" type="CodeableConcept">
            <xs:annotation>
              <xs:documentation>A code (or set of codes) that identify this substance.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="description" minOccurs="0" maxOccurs="1" type="string">
            <xs:annotation>
              <xs:documentation>A description of the substance - its appearance, handling requirements, and other usage notes.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="instance" type="Substance.Instance" minOccurs="0" maxOccurs="1">
            <xs:annotation>
              <xs:documentation>Substance may be used to describe a kind of substance, or a specific package/container of the substance: an instance.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="ingredient" type="Substance.Ingredient" minOccurs="0" maxOccurs="unbounded">
            <xs:annotation>
              <xs:documentation>A substance can be composed of other substances.</xs:documentation>
           </xs:annotation>
          </xs:element>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:complexType name="Substance.Instance">
    <xs:annotation>
      <xs:documentation>A homogeneous material with a definite composition.</xs:documentation>
    </xs:annotation>
    <xs:complexContent>
      <xs:extension base="BackboneElement">
        <xs:sequence>
          <xs:element name="identifier" minOccurs="0" maxOccurs="1" type="Identifier">
            <xs:annotation>
              <xs:documentation>Identifier associated with the package/container (usually a label affixed directly).</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="expiry" minOccurs="0" maxOccurs="1" type="dateTime">
            <xs:annotation>
              <xs:documentation>When the substance is no longer valid to use. For some substances, a single arbitrary date is used for expiry.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="quantity" minOccurs="0" maxOccurs="1" type="Quantity">
            <xs:annotation>
              <xs:documentation>The amount of the substance.</xs:documentation>
           </xs:annotation>
          </xs:element>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:complexType name="Substance.Ingredient">
    <xs:annotation>
      <xs:documentation>A homogeneous material with a definite composition.</xs:documentation>
    </xs:annotation>
    <xs:complexContent>
      <xs:extension base="BackboneElement">
        <xs:sequence>
          <xs:element name="quantity" minOccurs="0" maxOccurs="1" type="Ratio">
            <xs:annotation>
              <xs:documentation>The amount of the ingredient in the substance - a concentration ratio.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="substance" minOccurs="1" maxOccurs="1" type="ResourceReference">
            <xs:annotation>
              <xs:documentation>Another substance that is a component of this substance.</xs:documentation>
           </xs:annotation>
          </xs:element>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
</xs:schema>
