Hi HN,<p>I have been thinking about how to represent patient medical data for an application to monitor and evaluate patient treatments, the system has to have many different stakeholders such as carers, patients, relatives, specialists who can all interact with the system on different levels: such as seeing which part of the medical records were modified by who, who has permission to access the different parts. I was wondering if you knew about any open source solutions for this problem or what tools would you tackle it with?<p>I was thinking about using git to track diffs on each patients medical data and visualising the git representation in a way to hide what it is built on. I wouldn't like to reinvent the wheel so I am curious about your experiences!<p>Thanks,