Fig. 2

MedTAG Architecture. The data layer comprises two relational databases, namely, MedTAG data and Log data to store all the information concerning the annotation process (e.g., concepts, labels, reports, users and their annotations) and logging data such as notifications of malformatted clinical reports. The business layer comprises two business units: Business logic and REST API which jointly control the whole information flow from the front-end to the database and vice-versa. The presentation layer provides the MedTAG front-end, a web interface allowing users to annotate medical reports and download their ground truths