Definition

If the start element is missing, the start of the period is not known. If the end element is missing, it means that the period is ongoing. Alternatively, this may be represented by having an explicit end in the future, in which case this means the period is expected/planned to end at the specified time.

Type

period

Attributes

Key	Type	Cardinality	Description
start	datetime	0..1	The start of the period. The boundary is inclusive.
end	datetime	0..1	End time with inclusive boundary, if not ongoing.

{
  "start" : "<datetime>",
  "end" : "<datetime>" 
}

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When both start and end date/time are specified, start must be earlier or equal to end for the Period to be considered valid.