Figure not available in HL7 v2.3.1 — ch03_01.svg is not published in this version of the specification.
Figure 3-1. EVN attributes

The EVN segment is used to communicate necessary trigger event information to receiving applications. Valid event types for all chapters are contained in HL7 table 0003 - Event type.

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C.LenElementv2.3FHIR
1..3-IDB1000300099EVN-1Event Type CodeOptionality-
2..26-TSR1-00100EVN-2Recorded Date/TimeOptionalityrecorded
3..26-TSO1-00101EVN-3Date/Time Planned EventOptionality-
4..3-ISO1006200102EVN-4Event Reason CodeData Type3 mappings
5..60-XCNO*018800103EVN-5Operator IDRepetitionagent.who(Practitioner)
6..26-TSO1-01278EVN-6Event OccurredNameoccurredDateTime
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