<xsd:attribute name="plane" default="XY" use="optional">
<xsd:annotation>
<xsd:documentation>For more information on this attribute, please refer to the VML Reference, located online in the Microsoft Developer Network (MSDN) Library.</xsd:documentation>
</xsd:annotation>
<xsd:simpleType>
<xsd:restriction base="xsd:string">
<xsd:enumeration value="XY">
</xsd:enumeration>
<xsd:enumeration value="ZX">
</xsd:enumeration>
<xsd:enumeration value="YZ">
</xsd:enumeration>
</xsd:restriction>
</xsd:simpleType>
</xsd:attribute>
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