PhysicalRecordSegmentType
A description of the physical record segment as found in the data store. 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. Identifies the Key variable identifying the segment if the identifier exists in the record, a file name identifier if the segment identification is expressed as part of the file name (used when each segment is stored in a separate file), the order of this segment in relation to other physical segments as part of the logical record, and a flag indicating whether or not the physical segment contains a key.
Properties
Name |
Type |
Description |
|
|---|---|---|---|
KeyVariableReference |
0..1 |
Reference to the Unique key variable for segment identification. |
|
KeyVariableValue |
0..1 |
Value of the variable for this segment. |
|
FileNameIdentification |
0..1 |
If the file containing this segment has a standard section of its file name, include it here. For example a segment number. For example, in the files 2000SF10001.csv and 2000SF10002.csv the last 4 digits contain the segment number. There is no standard means of specifying this information in a machine-actionable way. This statement is informational but in some legacy files may be the only location where the segment identification is found. |
|
SegmentOrder |
0..1 |
Indicates the position of this physical record segment within the logical record expressed as an integer. |
|
HasSegmentKey |
0..1 |
Set to true if there is a variable identifying the segment order. If true a segment key should be declared in a KeyVariableReference. Set to false if there are multiple segments and the identification of a particular segment is based on the order of the records within the file. |
Properties Inherited from IdentifiableType
Name |
Type |
Description |
|
|---|---|---|---|
URN |
1..1 |
The URN of the entity matching the DDI URN pattern associated with the value of the attribute typeOfIdentifier (Canonical or Deprecated). |
|
Agency |
1..1 |
This is the registered agency code with optional sub-agencies separated by dots. |
|
ID |
1..1 |
The ID of the object. This must conform to the allowed structure of the DDI Identifier and must be unique within the declared scope of uniqueness (Agency or Maintainable). |
|
Version |
1..1 |
The version number of the object. For the identifiable object this is the version number of its parent versionable at the point of creation or alteration of the non-administrative metadata of the identifiable. Versionable and Maintainable items increment their version number whenever the non-administrative metadata contained by the object changes. |
|
UserID |
0..n |
Allows for the specification of identifiers other than the specified DDI identification of the object. This may be a legacy ID from DDI-C, a system specific ID such as for a database or registry, or a non-DDI unique identifier. As the identifier is specific to a system the system must be identified with the UserID structure. |
|
UserAttributePair |
0..n |
A system specific user defined property of the object expressed as a key/value pair. As this is specific to an individual system the use of controlled vocabularies for the key is strongly recommended. |
Item Type Hierarchy
- IdentifiableType
PhysicalRecordSegmentType
Relationships
The following identified item types reference this type.
