At Fri, 08 Oct 2010 16:35:06 +0800,
Water Lin wrote:
>
>
> I am using org project to build my web page. I have written a lot of
> stuff but while I am publishing the org files, I just want to publish
> the part which are marked as DONE( the keyword ).
>
> Is it possbile?

Yes, for example with this function that is added to
org-export-process-hook:

(defun dmj:org-remove-subtrees-in-export ()
  "Remove subtrees during export."
  (org-map-entries (lambda ()
		     (let ((beg (point))
			   (end (org-end-of-subtree t)))
		       (kill-region beg end))) "/-DONE"))

(add-hook 'org-export-preprocess-hook 'dmj:org-remove-subtrees-in-export)

This function will remove all items that are not marked done
("/-DONE", see Manual about TAGS/PROP/TODO queries) before the
exported file is created.

Of course adding this function to the hook enables it for /all/
exports, what may not be what you've wanted.

Best,
  -- David
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