L.4.6.2.4 Backdrop

The complex type, CT_Backdrop, defines a unique place in the 3-D scene. The backdrop is a flat 2- D plane that can hold effects, such as shadows, oriented in 3-D space. The points and vectors contained within the backdrop are relative to world space. The complex type is defined as:

<xsd:complexType name="CT_Backdrop">
  <xsd:sequence>
    <xsd:element name="anchor" type="CT_Point3D" minOccurs="1"
      maxOccurs="1" />
    <xsd:element name="norm" type="CT_Vector3D" minOccurs="1"
      maxOccurs="1" />
    <xsd:element name="up" type="CT_Vector3D" minOccurs="1"
      maxOccurs="1"/>
    <xsd:element name="ext" type="CT_OfficeArtExtension" minOccurs="0"
      maxOccurs="1" />
  </xsd:sequence>
</xsd:complexType>

All of the complex types defined within this backdrop are defined elsewhere in DrawingML. As with other complex types, the backdrop also contains an element reserved for future extensibility.