"Date"@en-us . . . . "A point or period of time associated with an event in the lifecycle of the resource."@en-us . "[W3CDTF] http://www.w3.org/TR/NOTE-datetime" . "Date may be used to express temporal information at any level of granularity. Recommended best practice is to use an encoding scheme, such as the W3CDTF profile of ISO 8601 [W3CDTF]."@en-us . .