Descriptor¶
Generalization is InstanceValue.
Superclass hierarchy
InstanceValue
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
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 |
Descriptor_refersTo_ReferenceValue |
1..* |
|
0..* |
Descriptor_hasValueFrom_DescriptorValueDomain |
1..1 |
|
0..* |
Descriptor_isBasedOn_VariableDescriptorComponent |
1..1 |
|
0..* |
Descriptor_identifies_ReferenceVariable |
1..1 |
TBD
Diagram¶
TBD