<xs:element substitutionGroup="ifc:IfcConstructionResource" name="IfcConstructionMaterialResource" nillable="true" type="ifc:IfcConstructionMaterialResource"> </xs:element>
  <xs:complexType name="IfcConstructionMaterialResource">
    <xs:complexContent>
      <xs:extension base="ifc:IfcConstructionResource">
        <xs:sequence>
          <xs:element name="Suppliers" minOccurs="0" nillable="true">
            <xs:complexType>
              <xs:group ref="ifc:IfcActorSelect" maxOccurs="unbounded"> </xs:group>
              <xs:attribute ref="ex:itemType" fixed="ifc:IfcActorSelect"> </xs:attribute>
              <xs:attribute ref="ex:cType" fixed="set"> </xs:attribute>
              <xs:attribute use="optional" ref="ex:arraySize"> </xs:attribute>
            </xs:complexType>
          </xs:element>
          <xs:element name="UsageRatio" minOccurs="0" type="ifc:IfcRatioMeasure" nillable="true"> </xs:element>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>