Subset -> SubsetMember
ExternalClass.externalId -> ExternalClass.id
ExternalItem.externalId -> ExternalItem.id
PrecisionQualifier. precisionValue -> PrecisionQualifier.significantDigits
http://sourceforge.net/support/tracker.php?aid=3558969
http://sourceforge.net/support/tracker.php?aid=3568112
http://sourceforge.net/support/tracker.php?aid=3568114
http://sourceforge.net/support/tracker.php?aid=3568317
