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

    • 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.

    • ObjectName

    • 0..*

    • physicalFileName
    • Use when each physical segment is stored in its own file.

    • :ref:``

    • 0..1

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

0..*

PhysicalRecordSegment_has_PhysicalSegmentLayout

PhysicalSegmentLayout

0..1

0..*

PhysicalRecordSegment_isDefinedBy_Concept

Concept

0..*

0..*

PhysicalRecordSegment_mapsTo_LogicalRecord

LogicalRecord

0..1

0..*

PhysicalRecordSegment_represents_Population

Population

0..1

0..*

PhysicalRecordSegment_has_DataPoint

PhysicalRecordSegment

0..*

0..*

PhysicalRecordSegment_has_DataPointPosition

PhysicalRecordSegment

1..1

TBD

Diagram

TBD