CODEWITHSUNDEEP
hl7-fhir
Chris Grenz
Chris Grenz

Reputation: 161

FHIR Element Definition max/min

What does max/min mean on the root element of a resource or extension?

<element>
  <path value="Patient" />
  <min value="0" />
  <max value="*" />
  ...snip...
</element>

The cardinality allowed in a containing structure like Bundle? Doesn't make sense to me....

Upvotes: 0

Views: 188

Answers (1)

Lloyd McKenzie
Lloyd McKenzie

Reputation: 6793

For a resource, it doesn't mean anything. For an extension, it places constraints on what the cardinality is allowed to be for a slice instantiating that constraint in a profile. For example, if an extension has a cardinality of 1..5, then if that extension is referenced inside a profile, the minimum cardinality of that constraint element must be at least 1 and the maximum no more than 5. Most of the time this will just be used to indicate whether the extension will be allowed to repeat or not.

Upvotes: 1

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