struggle with using variable org-agenda-*-filter* properly

[Brady Trainor <algebrat@uw.edu>]

I am often having difficulties with the various org-agenda filter 
settings, for creating org-agenda-custom-commands. There is not much 
documentation, especially, examples for those new to for instance 
regexp, and Emacs' regexp, and how these work with org's syntax.

In the following agenda-custom-command, I tried to use regexp in 
regexp-filter and tag-filter, but could not succeed. I did successfully 
get the skip-function to work, but I was hoping to clarify if I should 
expect the other variables to work, now or in the future, and/or if you 
could help me understand how to use them properly.


(org-add-agenda-custom-command
  '("h" "habits"
    agenda ""
    ((org-agenda-files '("/e/org/agendas-main.org"))
     (org-agenda-skip-function
      '(org-agenda-skip-entry-if 'notregexp ":STYLE:.+habit"))
     (org-agenda-span 'day)
     ;; (org-agenda-regexp-filter-preset '(":STYLE:.+habit"))
     ;; (org-agenda-tag-filter-preset '("+STYLE=\"habit\""))
     )
    ))

I have tried various permutations of the syntax, but could not make the 
latter two variables work.



Leads:
  - http://orgmode.org/manual/Matching-tags-and-properties.html
    - which links to, 
http://orgmode.org/manual/Special-agenda-views.html#x-agenda-skip-entry-regexp, 
perhaps the intended solution at this time
  - http://orgmode.org/worg/org-tutorials/advanced-searching.html
  - http://www.emacswiki.org/emacs/RegularExpression


Thank you,

Brady