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StudyUnit | | | | Holds information about the sweeps of the study | Yes | https://ddialliance.github.io/ddimodel-web/DDI-L-3.2/item-types/StudyUnit/ |
| 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/StudyUnit/ |
| Abstract | | | A brief description of the sweep | Yes | https://ddialliance.github.io/ddimodel-web/DDI-L-3.2/item-types/StudyUnit/ |
| AnalysisUnit | | | A description of the unit of analysis. Most commonly this is individual or household in CLOSER. | Yes | https://ddialliance.github.io/ddimodel-web/DDI-L-3.2/item-types/StudyUnit/ |
| KindOfData | | | A list of the kinds of data included in the sweep, using a controlled vocabulary | Yes | https://ddialliance.github.io/ddimodel-web/DDI-L-3.2/item-types/StudyUnit/ |
| Universe | | | A description of the population of the sweep | Yes | https://ddialliance.github.io/ddimodel-web/DDI-L-3.2/item-types/StudyUnit/ |
| Citation | | | Holds reference information about the sweep | Yes | https://ddialliance.github.io/ddimodel-web/DDI-L-3.2/item-types/StudyUnit/ |
| | Title | | The official name of the sweep | Yes | https://ddialliance.github.io/ddimodel-web/DDI-L-3.2/composite-types/CitationType/ |
| | AlternateTitle | | An alternate title by which the sweep is known e.g. the first sweep of the 1970 British Cohort Study is also known as the British Births Study | No | https://ddialliance.github.io/ddimodel-web/DDI-L-3.2/composite-types/CitationType/ |
| | Creator | | The Principal Investigator at the time of the sweep | Yes | https://ddialliance.github.io/ddimodel-web/DDI-L-3.2/composite-types/CitationType/ |
| | Publisher | | The host institution at the time of the sweep | Yes | https://ddialliance.github.io/ddimodel-web/DDI-L-3.2/composite-types/CitationType/ |
| FundingInformation | | | Holds information about the funders at the time of the sweep | Yes | https://ddialliance.github.io/ddimodel-web/DDI-L-3.2/item-types/StudyUnit/ |
| | Organization | | The organisation providing the funding | Yes | https://ddialliance.github.io/ddimodel-web/DDI-L-3.2/composite-types/FundingInformationType/ |
| | GrantNumber | | The grant number of the funding | No | https://ddialliance.github.io/ddimodel-web/DDI-L-3.2/composite-types/FundingInformationType/ |
| Coverage | | | Holds information about the coverage of the sweep | Yes | https://ddialliance.github.io/ddimodel-web/DDI-L-3.2/item-types/StudyUnit/ |
| | SpatialCoverage | | Holds information about the spatial coverage of the sweep | Yes | https://ddialliance.github.io/ddimodel-web/DDI-L-3.2/composite-types/CoverageType/ |
| | | CountryCode | A code for the country covered by the sweep using the ISO 3166 codes e.g GB-ENG, GB-WLS | Yes | https://ddialliance.github.io/ddimodel-web/DDI-L-3.2/composite-types/GeographicCoverageType/ |
| | | Description | Where the country code is not adequate, this allows a description of the spatial coverage | No | https://ddialliance.github.io/ddimodel-web/DDI-L-3.2/composite-types/GeographicCoverageType/ |
| | | TopLevelReference | The highest geographical level at which data is available (e.g. country, county, district, etc.) | No | https://ddialliance.github.io/ddimodel-web/DDI-L-3.2/composite-types/GeographicCoverageType/ |
| | | LowestLevelReference | The lowest geographical level at which data is available (e.g. postcode, grid reference) | No | https://ddialliance.github.io/ddimodel-web/DDI-L-3.2/composite-types/GeographicCoverageType/ |
| | TemporalCoverage | | Holds information about the time period covered by the sweep | Yes | https://ddialliance.github.io/ddimodel-web/DDI-L-3.2/composite-types/TemporalCoverageType/ |
| | | Start date | This can be a year, a month and year or a full date | Yes | https://ddialliance.github.io/ddimodel-web/DDI-L-3.2/composite-types/ReferenceDateType/ |
| | | End date | This can be a year, a month and year or a full date and can be in a different format to start date | No | https://ddialliance.github.io/ddimodel-web/DDI-L-3.2/composite-types/ReferenceDateType/ |
| Life Stage | | | Controlled vocabulary listing the life stage of the sweep | Yes | https://ddialliance.github.io/ddimodel-web/DDI-L-3.2/composite-types/StandardKeyValuePairType/ |
| Version | | | Version number | Yes | https://ddialliance.github.io/ddimodel-web/DDI-L-3.2/item-types/Versionable/ |
| Dataset | | | References the datasets in the sweep | Yes | https://ddialliance.github.io/ddimodel-web/DDI-L-3.2/item-types/PhysicalInstance/ |
| DataCollection | | | References the data collections in the sweep | Yes | https://ddialliance.github.io/ddimodel-web/DDI-L-3.2/item-types/DataCollection/ |