Thanks Olaf, I will check it out and let you know how it goes :)

On Fri, Jan 13, 2012 at 2:45 AM, Olaf Dietsche <
olaf+list.orgmode@olafdietsche.de> wrote:

> Marcelo de Moraes Serpa <celoserpa@gmail.com> writes:
>
> > So, I made a small elisp function that basically creates a "reference
> > file" in my org dir and indexes it in an org file, so it can be
> > searchable with the agenda without the overhead of adding the file to
> > the agenda list:
> >
> > (defun create-reference-file (filename title tags) "Creates a new
> > reference and file it"
> >   (interactive (list
> >                 (read-string "Filename: ") (read-string "Title: ")
> >                 (read-string "Tags: ") ))
> >   (set-buffer (get-buffer-create filename)) (beginning-of-buffer)
> >   (insert (concat "* tags " tags))
> >    ;;saves the buffer (when (file-writable-p filename)
> >       (write-region (point-min) (point-max) (concat
> > "~/org/data/dynamic_reference/" filename ".org")))
> >   (set-buffer (find-file-noselect "~/org/gtd/reference.org"))
> >   (end-of-buffer) ;;(create-wiki-page filename) (insert (concat "** "
> >   title " " tags ":reference:file:\n")) (org-insert-time-stamp nil t
> >   nil) (insert "\n") (insert (concat
> >   "[[file://~/org/data/dynamic_reference/" filename
> > ".org]]"))
> >   (insert "\n") (save-buffer) )
> >
> > I'm only beginning with elisp, so bear with me...
> >
> > Anyway, it works as expected, but I would like the tags prompt to be
> > like the prompt org uses, with tags auto-completion and adding the : :
> > automatically around the tags. Right now, I have to type the : around
> > the words.
>
> C-h c C-c C-q runs the command org-set-tags-command.
> org-set-tags-command calls org-set-tags. Looking through org-set-tags in
> org.el, there's a part starting with a comment:
>
>        ;; Get a new set of tags from the user
>        ...
>                  (let ((org-add-colon-after-tag-completion t))
>                    (org-trim
>                     (org-icompleting-read "Tags: "
>                                           'org-tags-completion-function
>                                           nil nil current
> 'org-tags-history))))))
>        ...
>
> So, I guess org-icompleting-read is, what you are looking for.
>
> Regards, Olaf
>