Private Data Element Characteristics Sequence Attribute
| Tag | (0008,0300) |
|---|---|
| Type | Optional (3) |
| Keyword | PrivateDataElementCharacteristicsSequence |
| Value Multiplicity | 1 |
| Value Representation | Sequence (SQ) |
Characteristics of Private Data Elements within or referenced in the current SOP Instance.
See Section C.12.1.1.7.
One or more Items are permitted in this Sequence.
Section C.12.1.1.7
C.12.1.1.7 Private Data Element Characteristics
The creator of the Private Data Elements (identified by the value of Private Creator Reference (0008,0302)) is responsible for managing the Private Data Element Tags associated with them and ensuring that the Private Data Element (0008,0308) and the Private Data Element Keyword (0008,030D) are a unique pair, and that the other associated details are consistent.
Implementers are encouraged to describe all Private Data Elements in the Private Data Element Characteristics Sequence (0008,0300).
Note
The Private Data Element Characteristics Sequence (0008,0300) may describe Data Elements that are referenced in the current SOP Instance (for example they may be identified as a Selector Attribute), but do not exist as actual Data Elements in the current SOP Instance.
C.12.1.1.7.1 Private Data Element Value Multiplicity
For Data Elements with a fixed multiplicity, this Attribute shall contain a single integer value, e.g., 3.
For Data Elements with a variable multiplicity, this Attribute contains either two or three values. The first value is the minimum multiplicity, the second value is the maximum multiplicity. If the maximum multiplicity is open-ended, 0 is used. The third value, if present, is the "stride", i.e., the increment between valid multiplicity values. A stride is used when values are added in sets, such as an x/y/z set of coordinate values that is recorded in triplets. If the stride is 1, the third value may be omitted. The stride is not permitted to be 0.
Examples:
-
VM of 1-3 is expressed as 1,3 or 1,3,1 meaning the multiplicity is permitted to be 1, 2 or 3
-
VM of 1-n is expressed as 1,0 or 1,0,1
-
VM of 0-n is expressed as 0,0 or 0,0,1
-
VM of 3-3n is expressed as 3,0,3
For a Private Data Element Value Representation (0008,030A) of SQ, the multiplicity shall be 1 and the allowed number of Items in a Sequence is recorded in Private Data Element Number of Items(0008,030B).
C.12.1.1.7.2 Private Data Element Number of Items
For Sequences that permit a fixed number of Items, this Attribute shall contain a single integer value, e.g., 3.
For Sequences with a variable number of Items, this Attribute contains two values. The first value is the minimum number of Items, the second value is the maximum number of Items. If the maximum number of Items is open-ended, 0 is used.