Posted 08 January 2009 - 10:52 AM
The other part of [WO] refers to "other than the current subject". So, for example, if John Doe is a witness, and TMG (or SS) is creating a narrative for John Doe, John Doe is not included in the output of [WO]. When creating a narrative for some other person attached to the event, [WO] would include John Doe.
As Terry explained, [WO] is not restricted by roles. Also, note that every person attached to the event has a role. If you don't explicitly assign a role, the role will either be "Principal" or "Witness".