Descriptor

Generalization is InstanceValue.

Superclass hierarchy

Definition

Use of a code for variable identification in the context of a data structure and a variable descriptor component.

Examples

Consider two variables, i.e. income and age, with values apearing in the same column. Codes “income” and “age” are descriptors. They appear multiple time in a variable descriptor component, one for each value in the variable value component. Each descriptor references one of those values. This way it’s possible to identify which values correspond to income and which ones to age.

Explanatory notes


Subclasses


Inherited Properties

Name

Description

Data Type

Multi- plicity

agency

Agency expressed as filed with the DDI Agency ID registry [registry.ddialliance.org] with optional additional sub-agency extensions.

:ref:``

1..1

id

ID conforming to the allowed structure of the DDI Identifier and must be unique within the Agency.

:ref:``

1..1

isPersistent

Default value is false indicating that the content of the current version may change (may be in development mode). Set to true when the content of this version will no longer change.

:ref:``

1..1

isUniversallyUnique

Default value is false. If the id of the object was created as a Universally Unique ID (UUID) set to true.

:ref:``

1..1

localId

Locally used identifier unique with a specified context, such as a variable name within a dataset.

LocalIdFormat

0..*

version

Version number of the object.

:ref:``

1..1

versionDate

Date and time the object was changed expressed in standard ISO formats.

XSDdate

0..1

versionRationale

Reason for making a new version of the object.

RationaleDefinition

0..1

versionResponsibility

Contributor who has the ownership and responsibility for the current version.

:ref:``

0..1

Associations

Multiplicity

Association

Navigable Class

Multiplicity

1..1

Descriptor_refersTo_ReferenceValue

ReferenceValue

1..*

0..*

Descriptor_hasValueFrom_DescriptorValueDomain

DescriptorValueDomain

1..1

0..*

Descriptor_isBasedOn_VariableDescriptorComponent

VariableDescriptorComponent

1..1

0..*

Descriptor_identifies_ReferenceVariable

ReferenceVariable

1..1

TBD

Diagram

TBD