SFVec4d

<xs:simpleType name="SFVec4d">
  <xs:annotation>
    <xs:appinfo>SFVec4d is a 4-tuple set of double-precision floating-point values, specifying a 3D homogeneous vector.</xs:appinfo>
    <xs:documentation source="http://www.web3d.org/documents/specifications/19775-1/V3.3/Part01/fieldsDef.html#SFVec4dAndMFVec4d"/>
  </xs:annotation>
  <xs:restriction base="xs:string">
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