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| Fields | Description | Required | Repeatable | ||||
|---|---|---|---|---|---|---|---|
| Instrument | Holds information about the instrument (usually a questionnaire) | Yes | Yes | ||||
| Agency | The DDI agency identifier for the metadata e.g. uk.alspac, uk.cls.mcs | Yes | No | ||||
| InstrumentName | Title of the instrument | Yes | No | ||||
| InterviewerInstructions | Instructions linked to a question | ||||||
ControlConstruct | Yes | No | |||||
| Sequence | Section headings | Yes | Yes | ||||
| QuestionConstruct | Yes | No | |||||
| IfThenElse | Yes | No | |||||
| Loop | Yes | No | |||||
| StatementItem | Yes | No | |||||
| Question | |||||||
| LiteralText | |||||||
| Response Domain | |||||||
| Category | |||||||
| CategoryName | |||||||
| Label | |||||||
| CodeList | |||||||
| Version | Version number | Yes | No |