C.17.3.2.4 Content Sequence and Relationship Type
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##### C.17.3.2.4 Content Sequence and Relationship Type

Content Sequence (0040,A730) provides the hierarchical structuring of the Content Tree (see Section C.17.3.1) by recursively nesting Content Items. A parent (or source) Content Item has an explicit relationship to each child (or target) Content Item, conveyed by Relationship Type (0040,A010).

Table C.17.3-8 describes the Relationship Types between Source Content Items and the Target Content Items.

Table C.17.3-8. Relationship Type Definitions

Relationship Type | Description | Definition and Example
--- | --- | ---
CONTAINS | Contains | Source Item contains Target Content Item. E.g., CONTAINER "History" {CONTAINS: TEXT "mother had breast cancer", CONTAINS: IMAGE}
HAS OBS CONTEXT | Has Observation Context | Target Content Items shall convey any specialization of Observation Context needed for unambiguous documentation of the Source Content Item. E.g., CONTAINER "Report" {HAS OBS CONTEXT: PNAME "Recording Observer" = "Smith^John^^Dr^"}
HAS CONCEPT MOD | Has Concept Modifier | Used to qualify or describe the Concept Name of the Source Content item, such as to create a post-coordinated description of a concept, or to further describe a concept. E.g., CODE "Chest X-Ray" {HAS CONCEPT MOD: CODE "View = PA and Lateral"} E.g., CODE "Breast" {HAS CONCEPT MOD: TEXT "French Translation" = " Sein "} E.g., CODE "2VCXRPALAT" {HAS CONCEPT MOD: TEXT "Further Explanation" = "Chest X-Ray, Two Views, Postero-anterior and Lateral"}
HAS PROPERTIES | Has Properties | Description of properties of the Source Content Item. E.g., CODE "Mass" {HAS PROPERTIES: CODE "anatomic location", HAS PROPERTIES: CODE "diameter", HAS PROPERTIES: CODE "margin", …}.
HAS ACQ CONTEXT | Has Acquisition Context | The Target Content Item describes the conditions present during data acquisition of the Source Content Item. E.g., IMAGE {HAS ACQ CONTEXT: CODE "contrast agent", HAS ACQ CONTEXT: CODE "position of imaging subject", …}.
INFERRED FROM | Inferred From | Source Content Item conveys a measurement or other inference made from the Target Content Items. Denotes the supporting evidence for a measurement or judgment. E.g., CODE "Malignancy" {INFERRED FROM: CODE "Mass", INFERRED FROM: CODE "Lymphadenopathy",…}. E.g., NUM: "BPD" = "5mm" {INFERRED FROM: SCOORD}.
SELECTED FROM | Selected From | Source Content Item conveys spatial or temporal coordinates selected from the Target Content Item(s). E.g., SCOORD "POLYLINE1,1 5,10 5,10 1,10 1,1" {SELECTED FROM: IMAGE}. E.g., TCOORD "SEGMENT 60-200mS" {SELECTED FROM: WAVEFORM}.

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