Optional sourceChannel on which the event occurred.
Optional sourceLocale associated with the event.
Optional sourceReferrer URL of the source page.
Optional sourceIdentifier of the page on which the event occurred.
Optional sourceType of page on which the event occurred.
Optional sourceTitle of the page on which the event occurred.
Optional sourceName of the page on which the event occurred.
Optional sourceURL of the page on which the event occurred.
Attributes shared by events with a source user interface