ddi:studyunit:3_0

Imports: ddi:reusable:3_0 (reusable.xsd)
Imports: ddi:archive:3_0 (archive.xsd)
Imports: ddi:conceptualcomponent:3_0 (conceptualcomponent.xsd)
Imports: ddi:datacollection:3_0 (datacollection.xsd)
Imports: ddi:logicalproduct:3_0 (logicalproduct.xsd)
Imports: ddi:physicaldataproduct:3_0 (physicaldataproduct.xsd)
Imports: ddi:physicalinstance:3_0 (physicalinstance.xsd)
Imports: ddi:ddiprofile:3_0 (ddiprofile.xsd)

Global Elements

StudyUnit (StudyUnitType):

Abstract (r:IdentifiedStructuredStringType): A human-readable abstract of the study unit describing the nature and scope of the data collection, special characteristics of its content. Note that detailed information on the purpose of the study and structured coverage information are to be entered in Purpose and Coverage. During study development, or when creating documentation from incomplete legacy materials, this field should contain an appropriate statement such as "Under development", "Unavailable", "Not provided by creator", or some other similar statement

Purpose (r:IdentifiedStructuredStringType): The purpose of the study, in human-readable form. This should include detailed information on the investigator's primary study questions or hypotheses as well as information on any legal basis for the data collection, such as laws requiring the collection of census data for apportionment purposes. During study development, or when creating documentation from incomplete legacy materials, this field should contain an appropriate statement such as "Under development", "Unavailable", "Not provided by creator", or some other similar statement.

DDIProfileReference (r:ReferenceType): References a DDI Profile used by the study unit

KindOfData (KindOfDataType): Describes, with a string or a term from a controlled vocabulary, the kind of data documented in the logical product(s) of a study unit. Examples include survey data, census/enumeration data, administrative data, measurement data, assessment data, demographic data, voting data, etc.


Complex Types

StudyUnitType: Describes the study unit which encompasses specified data collection processes as well as their resultant data products. This includes all of it's associated documentation and metadata. A Study Unit corresponds to the "study" as described in a traditional codebook, although a codebook may relate to only a single data product from the study. Typically, a 2.* or earlier version can have its content marked up in DDI version 3.0 with a single study unit containing the bulk of the documentation and metadata. Multiple data products from the same "study" (typically separate DDI instances in 2.* and earlier) can be combined in a single 3.0 instance. (See "DDI 3.0 Documentation, Part 1: Basic Structures" for more detail regarding the mappings between 2.* and 3.0.)

KindOfDataType: Describes, with a string or a term from a controlled vocabulary, the kind of data documented in the logical product(s) of a study unit. Examples include survey data, census/enumeration data, administrative data, measurement data, assessment data, demographic data, voting data, etc.


Simple Types

KindOfDataTypeType: Provides a description of the types of data described by the KindOfData element.



Copyright © 2008 DDI Alliance, DDI Version 3.0 (2008-04-28)

This documentation is extracted from the inline documentation of DDI 3.0 XML Schema and is licensed under the terms of the GNU General Public License as the schema itself.