The Moodle 3.1 Database Schema "reverse engineered" from the source xml files using |
A Mysql MWB File that can be modified. moodle_31_erd.mwb .This file contains additional diagrams that show some of the modules in more detail.
A pdf rendering moodle_31_erd.pdf. A set of images of individual components of the diagram components
How the diagram was created, Diagram FAQ. See here for an archive of old versions