hi.i want see openkm table and ERD diagram! but i don't know openkm by default use which dbms.please help me 
My suggestion is configure OpenKM to working with MySQL and then use MySQL Workbench or Aquafold http://www.aquafold.com/ to generate ERD
About how to get it working with MySQL read here http://wiki.openkm.com/index.php/MySQL_-_OpenKM_6.2
