Owncloud mysql db schema and tables relations

Hi OC community, i’m asking if there is a manual in witch i can find detailed explanation of db and tables’s relations of owncloud mysql db install (i have 10.6 installation). I swearched in developer’s manual but i cant find anything about my concern. Thanks in advance on helping me.

Hi to all, i respawn this topic in the meantime i upgraded my install from 10.6 to 10.9.1; someone could put me in the right direction better if there is sort of documentation about sql structure.
Thanks in advance it’s much appreciated