The electronic health record (EHR) has been noted to improve health care, with the obvious advantages of retrieving information faster and easier, with greater legibility, and meeting and enabling auditing and legal requirements. Clinicians often use natural language when describing observations, diagnoses, and other biomedical concepts. This can make translation into machine-level semantics more complicated. To allow for documents to be read by computerized systems, a standard method of representing data would be preferred. Health Level 7 (HL7) has created standards for...