Universe

A Universe contextualizes a Unit Type by providing additional restriction characteristics. The class Universe covers both the GSIM 1.2 obects of Universe and Population, conflating them into a single class. A universe may be organized into hierarchical sub-universes. In addition to the standard name, label, and description, the universe may provide a generation code (how the universe is differentiated or split out from another universe), a definition of hierarchical sub-settings for the universe, and an attribute that indicates if the description of the universe is stated in terms of what the universe includes. DDI Lifecycle does not have a Population class as found in GSIM 1.2. It extends the definition of a Universe to include specification of time and geography in contextualizing a Unit Type. In GSIM 1.2 a Universe is a defined class of people, entities, events, or objects with no specification of time and geography, contextualizing a Unit Type. A Population refines a Universe by specifying time and/or geography.

Properties

Name

Type

Description

UniverseName

NameType

0..n

A name for the Universe. May be expressed in multiple languages. Repeat the element to express names with different content, for example different names for different systems.

Label

LabelType

0..n

A display label for the Universe. Supports multiple language versions of the same content as well as optional formatting of the content. Repeat for labels with different content, for example, labels with differing length limitations.

Description

StructuredStringType

0..1

A description of the content and purpose of the Universe. Supports multiple language versions of the same content as well as optional formatting of the content.

DefiningConceptReference

Concept

0..1

A concept that defines or aids in understanding the content of the universe. For example the Universe “Males” may link to the concept of “Male”.

UnitTypeReference

UnitType

0..1

Reference to a unit type being associated with this conceptual variable. TypeOfObject should be set to UnitType.

TypeOfUnit

CodeValueType

0..1

The entity type associated with this conceptual variable. For example, individuals, families or households, groups, institutions/organizations, administrative units, etc. Supports the use of an external controlled vocabulary.

LocationValueReference

LocationValueType

0..n

Reference to specific LocationValue for the Universe as described in a GeographicLocation.

GeographyOfUniverse

StructuredStringType

0..1

A description of the content and purpose of the Universe. Supports multiple language versions of the same content as well as optional formatting of the content.

TimePeriod

DateType

0..n

Reference to specific time period for the Universe. Repeat for non-continuous time periods.

UniverseGenerationCode

CommandCodeType

0..n

An expression of the universe in terms of the code used to generate or define it. For example how a given universe may be differentiated within a parent universe.

SubUniverseClassReference

SubUniverseClass

0..n

A sub-universe class provides a definition to the universes contained within it. For example the Sub-Universe Class of Gender for the Universe Resident Population may contain the Universe Males and the Universe Females

IsInclusive

boolean

0..1

The default value is “true”. The description statement of a universe is generally stated in inclusive terms such as “All persons residing in Europe”. Occasionally a universe is defined by what it excludes, i.e., “All persons residing in Europe except for those residing on U.S. Military bases”. In this case the value would be changed to “false”.

Properties Inherited from Versionable

Name

Type

Description

URN

string

1..1

Agency

string

1..1

ID

string

1..1

Version

string

1..1

UserID

UserIDType

0..n

Allows for the specification of identifiers other than the specified DDI identification of the object. This may be a legacy ID from DDI-C, a system specific ID such as for a database or registry, or a non-DDI unique identifier. As the identifier is specific to a system the system must be identified with the UserID structure.

UserAttributePair

StandardKeyValuePairType

0..n

A system specific user defined property of the object expressed as a key/value pair. As this is specific to an individual system the use of controlled vocabularies for the key is strongly recommended.

VersionResponsibility

string

0..1

Person or organization within the MaintenanceAgency responsible for the version change. If it is important to retain the affiliation between and individual responsible for the version and his/her agency, it may be included in this notation. This is primarily intended for internal use.

VersionResponsibilityReference

Agent

0..1

Reference person or organization within the MaintenanceAgency responsible for the version change, as described in an OrganizationScheme. If it is important to retain the affiliation between and individual responsible for the version and his/her agency, a Relation should be created between the individual referenced here and his/her organization. This is primarily intended for internal use.

VersionRationale

VersionRationaleType

0..1

Textual description of the rationale/purpose for the version change and a coded value to provide an internal processing flag within and organization or system. Note that versioning can only take place on objects owned by the specified DDI Agency. If you are creating a local instance of an object from another agency for current or future modification use BasedOnObject. If the changes being made result in what you determine to be new object rather than a version of a previous object, i.e. the change is too extensive to consider it a version of the existing object, create a new object and use BasedOnObject to provide a link to the object or objects that were a basis for the new object.

BasedOnObject

BasedOnObjectType

0..1

Use when creating an object that is based on an existing object or objects that are managed by a different agency or when the new object is NOT simply a version change but you wish to maintain a reference to the object that served as a basis for the new object. BasedOnObject may contain references to any number of objects which serve as a basis for this object, a BasedOnRationalDescription of how the content of the referenced object was incorporated or altered, and a BasedOnRationalCode to allow for specific typing of the BasedOnReference according to an external controlled vocabulary.

RelatedOtherMaterialReference

OtherMaterial

0..n

The inclusion of an existing OtherMaterial by reference. Use for any type of OtherMaterial not specifically addressed by an inline description for such as ExternalAid in QuestionItem.

VersionDate

cogsDate

0..1

Date of version using the union set BaseDateType. Duration should not be used in this field, even though allowed by the ISO format enforced by the parser.

IsPublished

boolean

0..1

Indicates that the maintainable will not be changed without versioning, and is a stable target for referencing.

Item Type Hierarchy

Relationships

The following identified item types reference this type.

Item Type

Property

ApprovalReview

ReviewObjectReference

Archive

LifecycleInformation/LifecycleEvent/Relationship/RelatedToReference_Versionable

CategoryGroup

UniverseReference

CodeListGroup

UniverseReference

ConceptGroup

GroupingUniverseReference

ConceptualVariableGroup

UniverseReference

ControlConstructGroup

UniverseReference

DevelopmentActivityGroup

UniverseReference

GenericMap

ItemMap/SourceItemReference

GeographicLocationGroup

UniverseReference

GeographicStructureGroup

UniverseReference

Group

UniverseReference

InstructionGroup

UniverseReference

InstrumentGroup

UniverseReference

LocalHoldingPackage

LocalAddedContent/ContentLinkingMap/LinkingMap/LocalObjectReference_Versionable

Maintainable

Note/Relationship/RelatedToReference_Versionable

ManagedRepresentationGroup

UniverseReference

MeasurementConstruct

UniverseReference

MeasurementGroup

UniverseReference

NCube

UniverseReference

NCubeGroup

UniverseReference

NCubeInstance

AttachedAttribute/AttributeReference/AttachmentRegionReference/UniverseReference

NCubeInstanceI

AttachedAttributeI/AttributeReference/AttachmentRegionReference/UniverseReference

NCubeInstanceT

AttachedAttributeT/AttributeReference/AttachmentRegionReference/UniverseReference

OrganizationGroup

UniverseReference

OtherMaterial

Relationship/RelatedToReference_Versionable

OtherMaterialGroup

UniverseReference

PhysicalInstanceGroup

UniverseReference

PhysicalStructureGroup

UniverseReference

ProcessingEventGroup

UniverseReference

ProcessingInstructionGroup

UniverseReference

QualityStandardGroup

UniverseReference

QualityStatementGroup

UniverseReference

QuestionConstruct

UniverseReference

QuestionGroup

UniverseReference

RecordLayoutGroup

UniverseReference

RepresentedVariableGroup

UniverseReference

ResourcePackage

UniverseReference

Sample

PopulationOfConcern/UniverseReference

SampleFrame

UniverseReference

SampleStep

Stratification/StratificationRationale/UniverseReference

SamplingInformationGroup

UniverseReference

SamplingPlan

IntendedTargetPopulation/UniverseReference

SamplingStage

Stratification/StratificationRationale/UniverseReference

StudyUnit

UniverseReference

SubUniverseClass

UniverseReference

UnitTypeGroup

UniverseReference

UniverseGroup

GroupingUniverseReference

UniverseScheme

UniverseReference

Variable

UniverseReference

VariableGroup

UniverseReference

Versionable

BasedOnObject/BasedOnReference

stub