quantity 

Numeric value capturing a measurement or count. Can only be interpreted in
combination with the unit or currency attribute.

Attribute Information

Used By

Attribute Group mei:mei_att.quantity.attribute.quantity

Source 

<xs:attribute name="quantity">
  <xs:annotation>
    <xs:documentation>Numeric value capturing a measurement or count. Can only be interpreted in combination with the unit or currency attribute.</xs:documentation>
  </xs:annotation>
  <xs:simpleType>
    <xs:restriction base="xs:decimal">
      <xs:minInclusive value="0"/>
    </xs:restriction>
  </xs:simpleType>
</xs:attribute>

Sample