The data collection describes the use of each data collection instrument. It forms part of the Sweep (StudyUnit) above.

Fields			Description	Required	DDI Documentation
DataCollection			Holds information about the use of a data collection instrument	Yes	https://ddialliance.github.io/ddimodel-web/DDI-L-3.2/item-types/DataCollection/
	Agency		The DDI agency identifier for the metadata e.g. uk.alspac, uk.cls.mcs	Yes	https://ddialliance.github.io/ddimodel-web/DDI-L-3.2/item-types/DataCollection/
	Label		The name of the DataCollection - this is the name of the instrument as it is written on the form in most cases	Yes	https://ddialliance.github.io/ddimodel-web/DDI-L-3.2/item-types/DataCollection/
	CollectionEvent		Holds information about the data collection interaction took place	Yes	https://ddialliance.github.io/ddimodel-web/DDI-L-3.2/item-types/DataCollection/
		DataCollectionOrganization	The organization that conducted the data collection	No	https://ddialliance.github.io/ddimodel-web/DDI-L-3.2/composite-types/CollectionEventType/
		ModeOfCollection	The mode of the collection e.g. CAPI, self-completion, etc. using a controlled vocabulary	Yes	https://ddialliance.github.io/ddimodel-web/DDI-L-3.2/composite-types/CollectionEventType/
		DataCollectionDate	Holds the start and end dates of a data collection	Yes	https://ddialliance.github.io/ddimodel-web/DDI-L-3.2/composite-types/CollectionEventType/
	Version		Version number	Yes	https://ddialliance.github.io/ddimodel-web/DDI-L-3.2/item-types/Versionable/
	Instrument (Questionnaire)		References the data collection instrument that was used (normally a questionnaire)	Yes	https://ddialliance.github.io/ddimodel-web/DDI-L-3.2/item-types/Instrument/

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