This refers to the data collection instrument used e.g. a questionnaire. It can have a one to many relationship with the Data Collection, as each instrument can used more than once.
The table gives a approximate idea of the structure of the DDI 3.2 XML instance used (it is not exact).
Please refer to the CLOSER GitHub page for more information.
| Fields | Description | Required | ||||
|---|---|---|---|---|---|---|
| Instrument | Holds information about the instrument (usually a questionnaire) | Yes | ||||
| InstrumentName | Instrument prefix | Yes | ||||
| Agency | The DDI agency identifier for the metadata e.g. uk.alspac, uk.cls.mcs | Yes | ||||
| InstrumentName | Title of the instrument | Yes | ||||
| InterviewerInstructionsScheme | Question instruction | No | ||||
| LiteralText | Instruction text | No | ||||
| Holds all constructs in order they appear in the questionnaire | Yes | |||||
| Sequence | Section of questionnaire which contains other control constructs | Yes | ||||
| ConstructName | Section header | |||||
| ConstructLabel | Section header | |||||
| QuestionConstruct | Holds question construct label, position and interviewee | Yes | ||||
| ConstructName | Question construct label e.g. qc_1 | |||||
| ConstructLabel | Question construct name e.g. 1 | |||||
| ResponseUnit | The person answering the question | |||||
| ControlConstructReference | Reference to the question | |||||
| IfThenElse | No | |||||
| ConstructName | Condition label e.g. c_q1 | |||||
| Description | Condition text | |||||
| Command | ||||||
| ProgramLanguage | Program language logic is in | |||||
| CommandContent | Condition logic | |||||
| LoopWhile | No | |||||
| ConstructName | Loop label e.g. l_q1 | |||||
| Command | ||||||
| ProgramLanguage | Program language logic is in | |||||
| CommandContent | Condition logic | |||||
| StatementItem | No | |||||
| ConstructName | Statement label e.g. s_q1 | |||||
| LiteralText | Statement text | |||||
| QuestionScheme | Contains the question items | Yes | ||||
| QuestionItem | Single question | Yes | ||||
| QuestionItemName | Question item label e.g. qi_1 | |||||
| LiteralText | Question text | |||||
| CodeDomain | Code list response domain | |||||
| CodeListReference | Reference to the code list | |||||
| ResponseCardinality | Number of options a respondent can select | |||||
| NumericDomain | Numeric response domain | |||||
| Label | Numeric response domain label | |||||
| NumericTypeCode | Type of numeric (float or interger) | |||||
| NumberRange | Min and max range | |||||
| TextDomain | Text response domain max length | |||||
| Label | Text response domain label | |||||
| DateTimeDomain | Date response domain | |||||
| Label | Date response domain label | |||||
| DateTypeCode | Date, time or duration | |||||
| QuestionGrid | Matrix of questions | No | ||||
| QuestionGridName | Question grid label e.g. qc_1 | |||||
| LiteralText | Question text | |||||
| GridDimension | Contains the structure of the matrix and response domains | |||||
| CodeDomain | Code lists for X and Y axis | |||||
| StructuredMixedGridResponseDomain | Contains the response domains attached to the grid | |||||
| CategoryScheme | Yes | |||||
| CategoryName | ID of category (auto-generated) | |||||
| Label | Category text | |||||
| CodeList | Yes | |||||
| Label | Code list label | |||||
| Value | Code value |