Visualising OMOP

It's hard to get an idea of what the structure of the OMOP vocabularies are, so here's a nice interactive treemap to help. I've split the database in a slightly artificial hierarchy that runs:

1. Domain
2. Vocabulary
3. Concept class
4. Standard/Non-standard/Classification concept

I know that vocabularies can contain concepts with several domains, but a treemap needs a hierarchy, and this is the best way to split things by my conception of the database.

Click on it! When you click, it expands the box you've selected! To go back up a level, click the white bar at the top.