Within powerKNOW the following user roles are supported / implemented.
Editor
Only editors are allowed to edit / change documents and to mark a
document as 'completed'.
Expert
User can be referenced as an expert in knowledge documents.
Approver
Only approvers are allowed to mark a document as 'approved/released',
making it available to normal readers.
Knowledge Manager
Only knowledge managers are allowed to change configuration, change users,
change keyword tree.
Reader
A reader with no additional rights is allowed to search and read
knowledge documents. He will see only documents marked as 'approved'.
Additionally a user can be marked as disabled. Disabled users are not allowed
to login and will not have any of the rights normally implied with their
respective roles.