Quick --sign question

[Gentoo-Wally]

If you sign a file using --sign

gpg --output doc.sig --sign doc

the docs say....

http://www.gnupg.org/gph/en/manual.html#AEN136

"The document is compressed before being signed, and the output is in
binary format."

This means that the output file doc.sig is compressed and signed.
This does _NOT_ mean it is encrypted...correct? --sign does not sign
and encrypt, right?

Also, what is the compression method?

Thx,
Wally