XMLSerialiser should serialise the assumedVvalue of an COrdinal
XMLSerialiser should serialise the symbol of an ordinal
XMLSerialiser should serialise the precision
XMLSerialiser should serialise the CDuration pattern as the pattern, not the value
XMLSerialiser should serialise an empty range for a CDuration as lower_unbounded and upper_unbounded =true (insead of not at all)
XMLSerialiser needs to correctly serialise a DV_INTERVAL<DV_QUANTITY> (e.g.) as just that, not as DV_INTERVAL<_DV_QUANTITY> (which previous to this commit happens due to the camelcase conversion algorithm