The CriterionMassType defines a CriterionDecimalType with an optional massUnit attribute that identifies the unit being used by its unit name. If no value for the attribute is given in an instance file when a mass value is given, the unit type is the primary mass unit specified in the PrimaryUnits element of a FileUnits element, if there is a FileUnits element, and kilograms if not.
The optional massUnit attribute defines the unit name for the CriterionMassType.
Source
<xs:complexType name="CriterionMassType"><xs:annotation><xs:documentation>The CriterionMassType defines a CriterionDecimalType with an optional massUnit attribute that identifies the unit being used by its unit name. If no value for the attribute is given in an instance file when a mass value is given, the unit type is the primary mass unit specified in the PrimaryUnits element of a FileUnits element, if there is a FileUnits element, and kilograms if not.</xs:documentation></xs:annotation><xs:complexContent><xs:extension base="CriterionDecimalType"><xs:attribute name="massUnit" type="xs:token"><xs:annotation><xs:documentation>The optional massUnit attribute defines the unit name for the CriterionMassType.</xs:documentation></xs:annotation></xs:attribute></xs:extension></xs:complexContent></xs:complexType>
<xs:attribute name="massUnit" type="xs:token"><xs:annotation><xs:documentation>The optional massUnit attribute defines the unit name for the CriterionMassType.</xs:documentation></xs:annotation></xs:attribute>