Valid values for switchValue

What are valid values for switchValue ( in web.config: system.diagnstics/sources/source)? I have found “verbose” and “off”, but cannot find any other values in the documentation or online. I’d like to have the trace enabled, but the log gets large quickly with switchValue set to “verbose”. Is there a value between “off” and “verbose”?

Currently we only support “verbose” and “off”. The intention of the log is for problem determination and should only be turned on as required.
We include a ComponentSpace.SAML2.Notifications.ISAMLObserver interface that may be used for auditing etc.
The ComponentSpace.SAML2.Notifications.SAMLObservable class includes a Subscribe method that allows you to subscribe to various SAML related events.
You could use this to add auditing etc if required.