I want to be able to store free text medical records in an ontologically friendly format (preferably owl 2). While I have come across this useful resource: https://schema.org/MedicalSignOrSymptom it is not entirely clear how one could record a set of symptoms.
Patient complains of severe abdominal pain.
Pain, which is abdominal in nature and rated as severe, is the data which has to be recorded from the above sentence.
Where may I find approved style guidelines with which to approach such data?