Is Hibernate “under-documented”?
Hibernate ships with a 220 page reference user manual (in six languages). If that’s not enough, there is a 400 page book, Hibernate in Action, written by two members of the Hibernate team, and several other books about Hibernate from various authors. Dozens of tutorials, demo applications, and presentations are freely available (and linked on the Hibernate website). Hibernate is the most documented ORM solution ever.