DICOM PS3.3 2018a - Information Object Definitions

C.17.3.2.5 Referenced Content Item Identifier
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##### C.17.3.2.5 Referenced Content Item Identifier

Content Items are identified by their position in the Content Item tree. They have an implicit order as defined by the order of the Sequence Items. When a Content Item is the target of a by-reference relationship, its position is specified in the Referenced Content Item Identifier (0040,DB73) in a Content Sequence Item subsidiary to the source Content Item.

### Note

Figure C.17.3-3 illustrates an SR content tree and identifiers associated with each Content Item:

Figure C.17.3-3. Use of Position as SR Content Item Identifier (Informative)

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DICOM PS3.3 2018a - Information Object Definitions