Re: Tag hierarchies

[Bingo UV <right.ho@gmail.com>]

On Fri, 21 Aug 2015 16:35:31 -0700
Shankar Rao <shankar.rao@gmail.com> wrote:

> I've read about tag hierarchies in the manual
> (http://orgmode.org/manual/Tag-hierarchy.html#Tag-hierarchy) and my
> understanding is that searching for a group tag A will search for
> headlines tagged either with A or any of A's descendants. However this
> isn't the behavior I observe. In the example below, if I do a agenda
> tag search for :agroup:, :dgroup, or :egroup:, nothing shows up in the
> search. Only tags that are explicitly in a headline, like :foo:,:bar:,
> or :bgroup:, show up in searches. Is this a bug or a misunderstanding
> of how tag hierarchies are supposed to work? org-group-tag is set to t
> (the default).
> 
> Shankar Rao
> Aquamacs 3.2 GNU Emacs 24.4.51.2
> Org 8.2.10
> 
> ------ begin example
> #+STARTUP: overview
> #+TAGS: [ agroup : foo baz ]
> #+TAGS: [ bgroup : bar ]
> #+TAGS: [ cgroup ]
> #+TAGS: [ dgroup : gah ]
> #+TAGS: [ egroup : doh meh ]
> 
> * TODO Cure
> cancer                                                      :foo: **
> DONE Sequence human genome ** WAIT Obtain funding from government
> ** DONE Find cancer causing genes
> ** DONE Genetically engineer rate with gene
> CLOSED: [2015-08-12 Wed 16:00]
> ** DONE Test for cancer in rats
> CLOSED: [2015-08-13 Thu 11:00]
> ** DONE Develop gene therapy for humans
> CLOSED: [2015-08-17 Mon 16:19]
> ** TODO Find human test subjects
> * End
> homelessness                                                      :foo:
> ** DONE Find all homeless people CLOSED: [2015-08-17 Mon 16:15]
> ** DONE Get money to build a bunch of homes
> CLOSED: [2015-08-21 Fri 12:07]
> ** DONE Build homes for homeless people
> CLOSED: [2015-08-21 Fri 10:07]
> ** DONE Give homes to homeless people
> CLOSED: [2015-08-21 Fri 13:07]
> * Write paper on cancer gene
> therapy                                    :foo: ** TODO Make outline
> for paper
> * DONE Make presentation on ending
> homelessness                         :foo: CLOSED: [2015-08-14 Fri
> 17:15]
> * TODO Provide inputs for cancer research progress
> report               :foo: DEADLINE: <2015-09-02 Wed>
> * TODO Determine hardware requirements for cold
> fusion                  :baz:
> * DONE Provide inputs for cold fusion research progress
> report          :baz: CLOSED: [2015-08-12 Wed 14:20]
> * Investigate methods for hot, but not that hot
> fusion                  :baz:
> * TODO Brainstorm with Stephen Hawking on new laws of
> robotics          :gah:
> * DONE Look at papers on chilly
> superconductors                         :doh:
> * Investigate models for chilly
> superconductors                         :doh:
> * WAIT Proposal for trip to
> Mars                                 :doh:cgroup: ** DONE E-mail
> reminder to NASA director ** DONE Rehearse proposal presentation
> * TODO Proposal for autonomous car
> project                      :bgroup::doh: ** DONE Go over papers on
> autonomous cars CLOSED: [2015-08-20 Thu 14:08]
> ** DONE Discuss them with Elon Musk
> CLOSED: [2015-08-20 Thu 16:08]
> ** DONE Add charts on new ideas to proposal presentation
> CLOSED: [2015-08-20 Thu 17:10]
> * TODO Respond to critiques of economic
> plan                            :meh: ** TODO Paragraph explaining
> more about how OneTrueTax works
> * TODO Develop new fungi that taste like
> chicken                        :bar: ** DONE Find chicken genes that
> contribute to taste CLOSED: [2015-08-19 Wed 21:18]
> ** DONE Splice chicken genes into fungi DNA
> CLOSED: [2015-08-19 Wed 21:18]
> ** DONE Breed new fungi
> CLOSED: [2015-08-19 Wed 21:18]
> ** DONE Cook basic dishes with new fungi
> CLOSED: [2015-08-19 Wed 21:18]
> ** TODO Explore different kinds of seasoning
> ** TODO Explore difference between frying, baking, boiling fungi
> ** TODO Test cooked chicken-fungi with food scientists
> ** TODO Test cooked chicken-fungi with blind panel
> ------ end example
> 

Tag hierarchy is a new feature in Org 8.3 :
http://orgmode.org/Changes.html