<xsd:element name="Construction">
  <xsd:annotation>
    <xsd:documentation>A Construction is a combination of layers, such as a wall or a roof</xsd:documentation>
  </xsd:annotation>
  <xsd:complexType>
    <xsd:choice minOccurs="0" maxOccurs="unbounded">
      <xsd:element ref="Name" minOccurs="0"/>
      <xsd:element ref="Description" minOccurs="0"/>
      <xsd:element ref="U-value" minOccurs="0"/>
      <xsd:element ref="Absorptance" minOccurs="0" maxOccurs="unbounded"/>
      <xsd:element ref="Roughness" minOccurs="0"/>
      <xsd:element ref="Albedo" minOccurs="0"/>
      <xsd:element ref="Reflectance" minOccurs="0" maxOccurs="unbounded"/>
      <xsd:element ref="Transmittance" minOccurs="0" maxOccurs="unbounded"/>
      <xsd:element ref="Emittance" minOccurs="0" maxOccurs="unbounded"/>
      <xsd:element ref="Cost" minOccurs="0" maxOccurs="unbounded"/>
      <xsd:element ref="PercentExisting" minOccurs="0"/>
      <xsd:element ref="FireFace" minOccurs="0" maxOccurs="2"/>
      <xsd:element ref="Laye |