Source:http://linkedlifedata.com/resource/umls/id/C0743559
NCI: A discrepancy between a computed, observed, or measured value or condition and the true, specified, or theoretically correct value or condition. (Free Online Dictionary of Computing),HL7V3.0: <p><b>Definition:</b>An issue which has prevented, or will prevent (unless a management is provided for the issue by the sender), the successful processing of an interaction. Response interactions which include an issue which is an Error are a 'rejection', indicating that the request was not successfully processed.</p><p><b>Example:</b>Unable to find specified patient.</p>