<status value="draft"/><experimental value="false"/><date value="2018-08-19T21:48:56+10:00"/><publisher value="HL7 (FHIR Project)"/><contact><telecom><system value="url"/><value value="http://hl7.org/fhir"/></telecom><telecom><system value="email"/><value value="fhir@lists.hl7.org"/></telecom></contact><description value="SHALL applications comply with this constraint?"/><caseSensitive value="true"/><valueSet value="http://hl7.org/fhir/ValueSet/constraint-severity"/><content value="complete"/><concept><code value="error"/><display value="Error"/><definition value="If the constraint is violated, the resource is not conformant."/></concept><concept><code value="warning"/><display value="Warning"/><definition value="If the constraint is violated, the resource is conformant, but it is not necessarily following best practice."/></concept></CodeSystem>

ConstraintSeverity

SHALL applications comply with this constraint?

This code system http://hl7.org/fhir/constraint-severity defines the following codes:

Code	Display	Definition
error	Error	If the constraint is violated, the resource is not conformant.
warning	Warning	If the constraint is violated, the resource is conformant, but it is not necessarily following best practice.