<xs:complexType name="TriangleVertexNormalType"><xs:annotation><xs:documentation>The TriangleVertexNormalType defines the normal vector specified in a triangle vertex.</xs:documentation></xs:annotation><xs:simpleContent><xs:extension base="UnitVectorType"><xs:attribute name="vertex" type="I2Type" use="required"><xs:annotation><xs:documentation>The vertex attribute is a pair of non-negative integers, where the first value is a triangle index and the second value is a vertex index.</xs:documentation></xs:annotation></xs:attribute></xs:extension></xs:simpleContent></xs:complexType>
<xs:attribute name="vertex" type="I2Type" use="required"><xs:annotation><xs:documentation>The vertex attribute is a pair of non-negative integers, where the first value is a triangle index and the second value is a vertex index.</xs:documentation></xs:annotation></xs:attribute>