DEFINITION: Textual description of the time period to which the main variables refer to.
CONTEXT: Statistical variables refer to specific times, which may be limited to a reference time point (e.g. a day) or a time period (e.g. a month, a fiscal year, a calendar year or several calendar years).
SOURCE: SDMX content –oriented guidelines. Annex 4: Metadata common vocabulary. SDMX, 2009.