Q: org-publish-project-alist and :exclude

[David Masterson]

In the Org Mode manual section 14.1.3, it says that ":exclude" takes a
regular expression of filenames to exclude from publishing but it
doesn't really explain what the regular expression format is (I assume
Elisp regex).  I have two Org files that I want to exclude:

* calendar-beorg.org
* init.org

So I have this form:

  :exclude "\(init\|calendar-beorg\).org"

but that doesn't seem to work as I get an ignorable error in processing
calendar-beorg.org (a known Beorg issue).

Is my regex wrong?

-- 
David Masterson