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Controlled VocabularyDesciptionSource
The subject area the questions and variables map to.CLOSER
Life Stage

Phases of the participants life used to categorise the instruments (not to be confused with DDI LifecycleEventType).

The procedure, technique, or mode of inquiry used to attain the data.DDI
The person that provided the information for the instrument (not to be confused with DIDI Response Unit).CLOSER
The type of material being used with question External Aids.CLOSER
The standard internet MIME type used by processing applications for usage with question External Aids.CLOSER
Variable Source  A description of the type of instrument being used.CLOSER
Biological Sample  
Use Condition  A list of the types of access arrangement for the data.CLOSER
Commonality Type  Type of commonality between itemsCLOSER
Variable Type Flag  
Analysis Unit  The unit being analysedCLOSER