Hi,
I've successfully used the regular expression searches Herbert Sitz
describes to search and query a small (~ 500 kB) Org database of all
my source materials (text clippings) for a project, where some of the
properties I used had multiple values.
You will find Matt Lundin's Advanced searching tutorial invaluable:
http://orgmode.org/worg/org-tutorials/advanced-searching.html
Org has some basic support for multivalue properties, mainly for
editing (getting, putting, adding, removing) and also a membership
test. See the manual:
[[info:org#Using%20the%20property%20API]]
Note that unlike your example setup, the values are not comma-separated.
The multivalue support does not, as far as I remember, extend to match
expressions for searches etc. This would probably be non-trivial to
implement. Something could probably be cobbled up with
org-entry-member-in-multivalued-property. But regexp searches are
fairly simple to use, and work now.
You'll want to think carefully about what you put in properties, what
you put in tags, and what you put in multi-value properties, with a
view to making this easy to search and change as your file grows.
Yours,
Christian
On 12/11/11 1:09 AM, Herbert Sitz wrote:
Sven Bretfeld<sven.bretfeld<at> gmx.ch> writes:
A property search for "code-writing" should match this citation and all
others with this property. An additional search for "career" should
narrow the matches down. But orgmode understands "money, ... ethics" as
ONE value, not FOUR. That's the problem.
Sven --
I think you should be able to get results you want using "regular expression"
searches on your 'keyword' field. E.g., the following tags-todo search should
find headings that have both 'career' and 'code-writing' in a 'keyword'
property:
keyword={career}keyword={code-writing}
This search would find headings that had one or the other or both:
keyword={career\|code-writing}
Regular expressions start out simple but can get very complex. I expect there's
a way to get whatever you want out of the "multi-value" property strings you
want to use.
-- Herb
