DDEX Data Dictionary, 2019-09-16

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Intro

mead:UsagePeriod

A message term for mead:MeadMessage.

A Composite containing details about a Period of Time. Periods are typically describedby at least a StartDate or EndDate (or StartDateTime or EndDateTime) where the StartDate(Time) and EndDate(Time) are included in the Period. Thus a one-day period can be described by using the same date in the StartDate and EndDate. If two subsequent Periods form a continuum (i.e. with no break in-between) there are two ways to express this: (a) if using dates, the EndDate of the first Period must be one day before the StartDate of the second Period; (b) if using date times, the EndDateTime of the first Period must be the same as the StartDateTime of the second Period.

Component Structure
Components	Name	Description of Element Role	Cardinality	Data Type
	XmlSequence		1
	| StartDate	A Composite containing details of the Date and Place of an Event that marks the beginning of the Period (in ISO 8601:2004 format: YYYY-MM-DD). The StartDate must be no later than the EndDate if both are provided.	0-1	ern:EventDateWithoutFlags
	| EndDate	A Composite containing details of the Date and Place of an Event that marks the end of the Period (in ISO 8601:2004 format: YYYY-MM-DD). The EndDate must not be earlier than the StartDate if both are provided.	0-1	ern:EventDateWithoutFlags
Is Member of Composites	Composite Name	Description of Element Role	Cardinality	Label of Element in Composite	Further Reading
	mead:Usage	A Composite containing details about the Period of Time for which a usage is reported.	1-n	UsagePeriod

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