C.2 Conventions
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## C.2 Conventions

Literal values to be encoded in CDA elements are represented in the mapping tables in normal font, as a string, or as a coded value triplet:

- "NI"

- (codeValue, codingScheme, codeMeaning)

Conventions for mapping from DICOM attributes in the transformed SR are described in Section 5.2.8.

Data mapped from an SR Content Item is identified by the Concept Name of the Content Item, represented in the mapping tables as a triplet in italic font:

- (codeValue, codingScheme, codeMeaning)

Data mapped from a specific Attribute in an SR Content Item uses the triplet to identify the Content Item, with the > character and the specific attribute name and tag:

- (codeValue, codingScheme, codeMeaning) > Attribute Name (gggg,eeee)

Additional notes are within square brackets:

- [Note]

Mandatory CDA elements for which there is no corresponding source data in the SR SOP Instance may be coded with a nullFlavor attribute (see Section 5.3.2).

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