<xsd:complexType name="VerticalDatumType" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<xsd:annotation>
<xsd:documentation>A textual description and/or a set of parameters identifying a particular reference level surface used as a zero-height surface, including its position and orientation with respect to the Earth for any of the height types recognized by this standard. </xsd:documentation>
</xsd:annotation>
<xsd:complexContent>
<xsd:extension base="gml:AbstractDatumType">
<xsd:sequence>
<xsd:element ref="gml:verticalDatumType" minOccurs="0" />
</xsd:sequence>
</xsd:extension>
</xsd:complexContent>
</xsd:complexType>
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