DICOM PS3.20 2017a - Imaging Reports using HL7 Clinical Document Architecture

5.2.4 Cardinality
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### 5.2.4 Cardinality

Each element/attribute has a cardinality indicator that specifies the number of allowable occurrences within a template instance. The cardinality indicators are interpreted with the following format "m…n" where m represents the least and n the most:

- 0..1 zero or one

- 1..1 exactly one

- 1..* at least one

- 0..* zero or more

- 1..n at least one and not more than n

- 0..0 none [SHALL NOT]

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DICOM PS3.20 2017a - Imaging Reports using HL7 Clinical Document Architecture