PhysicalRecordSegment¶
Generalization is AnnotatedIdentifiable.
Superclass hierarchy
Definition¶
Description of each physical storage segment required to completely cover the logical record.
Examples¶
The file below has four InstanceVariables: PersonId, SegmentId, AgeYr, HeightCm. The data for each person (identified by PersonId) is recorded in two segments (identified by SegmentId), “a” and “b”. AgeYr is on physical segment a, and HeightCm is on segment b. These are the same data as described in the UnitSegmentLayout documentation.
1 a 22;
1 b 183;
2 a 45;
2 b 175.
Explanatory notes¶
A logical record may be stored in one or more segments housed hierarchically in a single file or in separate data files. All logical records have at least one segment.
Subclasses¶
Properties¶
- When duplicates is false, then every Member is unique in the Collection. In this case, the Collection is a Set.
:ref:``
1..1
- name
A linguistic signifier. Human understandable name (word, phrase, or mnemonic) that reflects the ISO/IEC 11179-5 naming principles. If more than one name is provided then a context to differentiate usage must be provided as well.
0..*
- physicalFileName
Use when each physical segment is stored in its own file.
:ref:``
0..1
- purpose
Explanation of the intent of some decision or object. Supports the use of multiple languages and structured text.
0..1
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 |
---|---|---|---|
0..* |
PhysicalRecordSegment_has_PhysicalSegmentLayout |
0..1 |
|
0..* |
PhysicalRecordSegment_isDefinedBy_Concept |
0..* |
|
0..* |
PhysicalRecordSegment_mapsTo_LogicalRecord |
0..1 |
|
0..* |
PhysicalRecordSegment_represents_Population |
0..1 |
|
0..* |
PhysicalRecordSegment_has_DataPoint |
0..* |
|
0..* |
PhysicalRecordSegment_has_DataPointPosition |
1..1 |
TBD
Diagram¶
TBD