<complexType name="ConventionalUnitType">
<annotation>
<documentation>Definition of a unit of measure which is related to a preferred unit for this quantity type through a conversion formula. A method for deriving this unit by algebraic combination of more primitive units, may also be provided. </documentation>
</annotation>
<complexContent>
<extension base="gml:UnitDefinitionType">
<sequence>
<choice>
<element ref="gml:conversionToPreferredUnit" />
<element ref="gml:roughConversionToPreferredUnit" />
</choice>
<element ref="gml:derivationUnitTerm" minOccurs="0" maxOccurs="unbounded" />
</sequence>
</extension>
</complexContent>
</complexType>
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