description: For episodes of care it can be relevant, and always is in general practitioner workflow, when the first encounter was that a problem/concern was discussed. You could try to get to that date by going through all encounters taking into account that the EpisodeOfCare might have evolved over time, but this extension provides a convenience method to avoid that.
package_name: nictiz.fhir.nl.stu3.zib2017
derivation: constraint
name: EpisodeOfCare DateFirstEncounter
type: Extension
elements:
  url:
    pattern: {type: Uri, value: 'http://nictiz.nl/fhir/StructureDefinition/EpisodeOfCare-DateFirstEncounter'}
    index: 0
  valueDateTime:
    short: Date and if applicable time/timezone
    type: dateTime
    meaningWhenMissing: No information can be inferred from missing the date/time.
    index: 1
    slicing:
      slices:
        valueDateTime:
          match: {}
          schema: {short: Date and if applicable time/timezone, type: dateTime, _required: true, meaningWhenMissing: No information can be inferred from missing the date/time., index: 1}
          min: 1
package_version: 2.2.12
class: extension
kind: complex-type
url: http://nictiz.nl/fhir/StructureDefinition/EpisodeOfCare-DateFirstEncounter
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 2.0.3
required: [valueDateTime]