New documentation available at https://docs.openkm.com/kcenter/
The documentation at the https://www.openkm.com/wiki is definitivily deprecated.
Consider only use it, if you are user of OpenKM version 6.2 and older.
Click in the banner to close the warning.
In administration search, you can do XPath and SQL queries directly on the repository. There some predefined searches like Locked documents, Documents created by user 'okmAdmin', Documents with property group 'okg:test' and Documents subscribed