This code system http://terminology.hl7.org/CodeSystem/validation-status defines the following codes:

CodeDisplayDefinition
successful Successful
failed Failed
unknown UnknownThe validations status has not been determined yet
 <status value="draft"/> <experimental value="false"/> <date value="2018-06-05T14:06:02+00:00"/> <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> <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="Status of the validation of the target against the primary source"/> <caseSensitive value="true"/> <valueSet value="http://terminology.hl7.org/ValueSet/verificationresult-validation-status"/> <content value="complete"/> <concept> <code value="successful"/> <display value="Successful"/> </concept> <concept> <code value="failed"/> <display value="Failed"/> </concept> <concept> <code value="unknown"/> <display value="Unknown"/> <definition value="The validations status has not been determined yet"/> </concept> </CodeSystem>