ReferenceDate

Extends: 
Is Abstract: 
no
Is Pattern: 
no
Definition: 

The date covered by the annotated object. In addition to specifying a type of date (e.g. collection period, census year, etc.) the date or time span may be associated with a particular subject or keyword. This allows for the expression of a referent date associated with specific subjects or keywords.

Explanatory Notes: 

Note that if needed you may use Start and Duration or Duration and End. These options may not be recognizable by all systems.

Example: 
A set of date items on income and labor force status may have a referent date for the year prior to the collection date. To express a duration the preference is for Start and End dates expressing two time points separated by a "/".
Property: 
NameCardinalityDatatypeDescription
subject
0..n
If the date is for a subset of data only such as a referent date for residence 5 years ago, use Subject to specify the coverage of the data this date applies to. May be repeated to reflect multiple subjects.
keyword
0..n
If the date is for a subset of data only such as a referent date for residence 5 years ago, use keyword to specify the coverage of the data this date applies to. May be repeated to reflect multiple keywords.
Relationship: 

Stage:

DDI 3.2: 
r:ReferenceDateType
Is extendable: 
Is property: 
1
RDF Mapping: