Identifies the difference between the date applied to the data as a whole and this specific item such as previous year’s income or residence 5 years ago. A value of true for the attribute isNegativeOffset indicates that the offset is the specified number of declared units prior to the date of the data as a whole and false indicates information regarding a future state.
If set to “true” the date is offset the number of units specified PRIOR to the default date of the data. A setting of “false” indicates a date the specified number of units in the FUTURE from the default date of the data.