Figure 1.

System architecture. Services in the box labeled Server run on the PhEMA server and are accessible via the public internet. The box labeled Client runs in the browser on the user’s machine and is accessed by navigating to a specific URL on the PhEMA server. Optional publicly accessible third party services such as additional FHIR servers or OHDSI Web API instances are shown in the box labeled Public Services. The Phenotype Repositories box shows repository services (currently only PheKB). The Institutional Services box shows services that run behind institutional firewalls.