information about wM DB tables

Where can I get the information about wM DB tables?
I need what tables are used by wM esp wmservice and the documentation of column values.
I am trying to find out the whether the WMSERVICE.duration is in sec or msec.

Your best bet would be to submit a request to WM Support. While you are waiting you maybe able to explore the data in the WMSERVICE table to determine the answer.

Mark