Override content of the revision specified by totitle, toid or torev.
This parameter specifies the slots that are to be modified. Use totext-{slot}, tocontentmodel-{slot}, and tocontentformat-{slot} to specify content for each slot.
The database is currently locked to new entries and other modifications, probably for routine database maintenance, after which it will be back to normal.
The system administrator who locked it offered this explanation: Major Server Maintenance, Access wil be restored soon.
