<xs:simpleType name="EnumerationString"><xs:annotation><xs:documentation xml:lang="en-US">Used as the base class for all 'codes' which cannot be handled as NMTOKEN</xs:documentation></xs:annotation><xs:restriction base="xs:string"><!-- 2014-11-04 AH: Updated to support SNOMED-CT post coordination expressions which are currently up to 89 characters long --><xs:maxLength value="128"/></xs:restriction></xs:simpleType>