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

<!-- 
  Variations/FRBR Project schema release 1.1
-->

<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"

            xmlns="http://vfrbr.info/vfrbr/1.1/expression"
            targetNamespace="http://vfrbr.info/vfrbr/1.1/expression"
            elementFormDefault="qualified"
            attributeFormDefault="unqualified"
            >

  <!--
    include entity attributes
    -->
  <xsd:include schemaLocation="http://vfrbr.info/schemas/1.1/vfrbr-expression-attrib.xsd"/>
  <!--
    include entity extensions
    -->
  <xsd:include schemaLocation="http://vfrbr.info/schemas/1.1/vfrbr-expression-extend.xsd"/>

  <!--
    XML element
    for vFRBR Expression entity
    -->
  <xsd:element name="expression">
    <xsd:complexType>
      <xsd:sequence>
        <xsd:element ref="titleOfTheExpression"
                     minOccurs="1" maxOccurs="unbounded"
                     />
        <xsd:element ref="formOfExpression"
                     minOccurs="0" maxOccurs="unbounded"
                     />
        <xsd:element ref="dateOfExpression"
                     minOccurs="0" maxOccurs="unbounded"
                     />
        <xsd:element ref="languageOfExpression"
                     minOccurs="0" maxOccurs="unbounded"
                     />
        <xsd:element ref="otherDistinguishingCharacteristic"
                     minOccurs="0" maxOccurs="unbounded"/>
        <!-- excluded
        <xsd:element
          ref="extensibilityOfExpression"
          minOccurs="0" maxOccurs="unbounded"/>
        <xsd:element
          ref="revisabilityOfExpression"
          minOccurs="0" maxOccurs="unbounded"/>
          -->
        <xsd:element ref="extentOfTheExpression"
                     minOccurs="0" maxOccurs="unbounded"
                     />
        <xsd:element ref="summarizationOfContent"
                     minOccurs="0" maxOccurs="unbounded"
                     />
        <xsd:element ref="contextForTheExpression"
                     minOccurs="0" maxOccurs="unbounded"
                     />
        <xsd:element ref="criticalResponseToTheExpression"
                     minOccurs="0" maxOccurs="unbounded"/>
        <!-- excluded
        <xsd:element
          ref="useRestrictionsOnTheExpression"
          minOccurs="0" maxOccurs="unbounded"/>
        <xsd:element
          ref="sequencingPattern"
          minOccurs="0" maxOccurs="unbounded"/>
        <xsd:element
          ref="expectedRegularityOfIssue"
          minOccurs="0" maxOccurs="unbounded"/>
        <xsd:element
          ref="expectedFrequencyOfIssue"
          minOccurs="0" maxOccurs="unbounded"/>
          -->
        <xsd:element ref="typeOfScore"
                     minOccurs="0" maxOccurs="1"
                     />
        <xsd:element ref="mediumOfPerformance"
                     minOccurs="0" maxOccurs="unbounded"/>
        <!-- excluded
        <xsd:element
          ref="scale"
          minOccurs="0" maxOccurs="unbounded"/>
        <xsd:element
          ref="projection"
          minOccurs="0" maxOccurs="unbounded"/>
        <xsd:element
          ref="presentationTechnique"
          minOccurs="0" maxOccurs="unbounded"/>
        <xsd:element
          ref="representationOfRelief"
          minOccurs="0" maxOccurs="unbounded"/>
        <xsd:element
          ref="geodeticGridAndVerticalMeasurement"
          minOccurs="0" maxOccurs="unbounded"/>
        <xsd:element
          ref="recordingTechnique"
          minOccurs="0" maxOccurs="unbounded"/>
        <xsd:element
          ref="specialCharacteristic"
          minOccurs="0" maxOccurs="unbounded"/>
        <xsd:element
          ref="technique"
          minOccurs="0" maxOccurs="unbounded"/>
          -->
        <!--
          extensions to entity attributes
          -->
        <xsd:element ref="note"
                     minOccurs="0" maxOccurs="unbounded"
                     />
        <xsd:element ref="extensions"
                     minOccurs="0" maxOccurs="1"/>
      </xsd:sequence>
      <!-- entity element identifier attribute -->
      <xsd:attribute name="identifier"
                     type="xsd:anyURI"
                     use="optional"/>
    </xsd:complexType>
  </xsd:element>

</xsd:schema>