On https://doc.ez.no/eZ-Publish/*
link: "Database schema doc", goes to broken link https://doc.ez.no/schemadoc/

This can be re-generated using ez Publish 5.3 demo install and the following java script:
https://github.com/ezsystems/schemadoc

This will solve some old issues in JIRA about schema doc being outdated as well (it has not been updated since maybe 4.5).