Reference to an existing Concept using the Reference structure.

Comments provided using a StructuredString to support multiple language versions of the same content as well as optional formatting of the content.

Describes a concept per ISO/IEC 11179.

Allows for grouping of concepts; groups may have a hierarchical structure.

Name of the Concept Group using the DDI Name structure.

Reference to an existing ConceptGroup using the Reference structure.

Name of the Concept using the DDI Name structure.

A comprehensive list of the concepts measured by the data that are being documented that is maintained by an agency.

Name of the Concept Scheme using the DDI Name structure.

A maintainable module for the conceptual components of the study or group of studies.

Name of the Conceptual Component using the DDI Name structure.

Describes a ConceptualVariable which provides the link between a concept to a specific universe (object) that defines this as a ConceptualVariable.

Contains a group of ConceptualVariables.

Name of the ConceptualVariableGroup using the DDI Name structure.

Reference to an existing ConceptualVariableGroup using the Reference structure.

Name of the ConceptualVariable using the DDI Name structure.

A comprehensive list of the ConceptualVariables measured by the data that are being documented and/or maintained by an agency.

Name of the ConceptualVariableScheme using the DDI Name structure.

Reference to an existing Concept using the Reference structure.

Contains a group of GeographicLocations.

Name of the InstructionGroup using the DDI Name structure.

Reference to an existing GeographicLocationGroup using the Reference structure.

A Scheme containing a set of geographic locations, each for a single Geography type, e.g., States, OR Counties, OR Countries, etc.

Name of the Geographic Location Scheme using the DDI Name structure.

Contains a group of GeographicStructures.

Name of the InstructionGroup using the DDI Name structure.

Reference to an existing GeographicStructureGroup using the Reference structure.

A Scheme containing a set of geographic structure types and their relationship to each other.

Name of the Geographic Structure Scheme using the DDI Name structure.

Reference to the concept expressed by the objects in this group using the r:Reference structure.

Reference to a Universe using the r:Reference structure.

Textual description of the XML scheme in which the classification is written.

URI to the XML scheme used in the vocabulary (DTD or XML Schema for the XML document above; schemes like DDI, Claset, Neuchatel, and DocBook).

A reference to a concept with similar meaning and a description of their differences.

Reference to an existing Concept using the Reference structure.

Reference to an existing Concept using the Reference structure.

A sub-universe group provides a definition to the universes contained within it.

Name of the SubUniverse Class using the DDI Name structure.

Reference to an existing SubUniverseClass using the Reference structure.

A brief textual description of the reason that a group was formed.

A brief textual description of the type of group created to associate a number of Instructions.

A brief textual description of the type of group created to associate a number of Instructions.

A brief textual description of the type of group created to associate a number of Instructions.

A brief textual description of the type of group created to associate a number of Instructions.

Describes a universe which may also be known as a population.

Information on the command used for generating the definition of the coverage of the universe.

Contains a group of Universes.

Name of the InstructionGroup using the DDI Name structure.

Reference to a UniverseGroup using the r:Reference structure.

Name of the Universe using the DDI Name structure.

Contains a set of Universe descriptions that may be organized into sub-universe structures.

Name of the Universe Scheme using the DDI Name structure.

Provides information about the vocabulary used to create a concept scheme.

The title of the vocabulary expressed using an International String to support multiple language versions of the same content.

URI to the vocabulary represented as an XML document.

Allows for grouping of concepts; groups may have a hierarchical structure.

A comprehensive list of the concepts measured by the data that are being documented that is maintained by an agency.

Describes a concept per ISO/IEC 11179.

A maintainable module for the conceptual components of the study or group of studies.

Contains a group of ConceptualVariables, which may describe an ordered or hierarchical relationship structure.

A comprehensive list of the ConceptualVariables measured by the data that are being documented and/or maintained by an agency.

Describes a ConceptualVariable which provides the link between a concept to a specific universe (object) that defines this as a ConceptualVariable.

Contains a group of GeographicLocations, which may describe an ordered or hierarchical relationship structure.

A Scheme containing a set of geographic locations, each for a single Geography type, e.g., States, OR Counties, OR Countries, etc.

Contains a group of GeographicStructures, which may describe an ordered or hierarchical relationship structure.

Contains information on the hierarchy of the geographic structure.

A reference to a concept with similar meaning and a description of their differences.

A sub-universe group provides a definition to the universes contained within it.

Contains a group of Universes, which may describe an ordered or hierarchical relationship structure.

Contains a set of Universe descriptions that may be organized into sub-universe structures.

Describes a universe which may also be known as a population.

Provides information about the vocabulary used to create a concept scheme.