VariableDescriptorComponent¶
Generalization is DataStructureComponent.
Superclass hierarchy
Definition¶
Role given to a represented variable in the context of a data structure to provide codes for variable identification.
Examples¶
Consider {“income”, “age”} to be the value domain of the represented variable working as a variable descriptor component. The two codes, i.e. “income” and “age”, are descriptors used to identify which values in the variable value component correspond to income and which ones to age.
Explanatory notes¶
Whenever more than one variable appears in the same column, we need a mechanism to distinguish which values correspond to which variable. This mechanism is provided by the variable descriptor component, which contains the codes used to link the variables to their values. This structure provides a flexible mechanism avoiding the need for a formal pointer.
Subclasses¶
Inherited Properties¶
Name |
Description |
Data Type |
Multi- plicity |
---|---|---|---|
semantic
|
The semantic of the DataStructureComponent expressed as a PairedExternalControlledVocabulary. |
0..* |
|
agency
from Identifiable
|
Agency expressed as filed with the DDI Agency ID registry [registry.ddialliance.org] with optional additional sub-agency extensions. |
:ref:`` |
1..1 |
id
from Identifiable
|
ID conforming to the allowed structure of the DDI Identifier and must be unique within the Agency. |
:ref:`` |
1..1 |
isPersistent
from Identifiable
|
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
from Identifiable
|
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
from Identifiable
|
Locally used identifier unique with a specified context, such as a variable name within a dataset. |
0..* |
|
version
from Identifiable
|
Version number of the object. |
:ref:`` |
1..1 |
versionDate
from Identifiable
|
Date and time the object was changed expressed in standard ISO formats. |
0..1 |
|
versionRationale
from Identifiable
|
Reason for making a new version of the object. |
0..1 |
|
versionResponsibility
from Identifiable
|
Contributor who has the ownership and responsibility for the current version. |
:ref:`` |
0..1 |
Associations¶
Multiplicity |
Association |
Navigable Class |
Multiplicity |
---|---|---|---|
1..1 |
VariableDescriptorComponent_refersTo_VariableValueComponent |
1..1 |
|
0..* |
VariableDescriptorComponent_isDefinedBy_DescriptorVariable |
0..1 |
TBD
Diagram¶
TBD