<xs:complexType name="FrequencyIntervalMeasure"> <xs:simpleContent> <xs:extension base="eml:AbstractMeasure"> <xs:attribute name="uom" use="required" type="eml:FrequencyIntervalUom"/> </xs:extension> </xs:simpleContent> </xs:complexType>
octave
<xs:attribute name="uom" use="required" type="eml:FrequencyIntervalUom"/>