Thanks for the confirmation, Nick.
So, the Document Object Model entity is derived from the same browser
volunteered information as populates the "referer" header, referenced
by RFC 2616.
http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html
Your reply means that Google Analytics does not reveal more about a
source than any other web analytics package can do.
There is potential within Google to do more, at least for AdWords and
DoubleClick clicks. The unique tags added by, for example, AdWords
AutoTagging potentially could carry the referring source of the
publisher, which would help advertisers to tune in, or out, specific
publishers more easily. This would be a unique win for Google
Analytics; no-one other than Google has that data.
Of course, if Google *did* use the extra info, I'd immediately
complain that Google was now playing vendor lock-in games ;) There's
no winning with some people, eh?
Cheers, JeremyC.