Re: [babel] How to set multiple variables with properties

[Christian Moe <mail@christianmoe.com>]

Hi again,

I was referring to these functions:
- org-entry-put-multivalued-property
- org-entry-get-multivalued-property
- org-entry-add-to-multivalued-property
- org-entry-remove-from-multivalued-property
- org-entry-member-in-multivalued-property
described here:
http://orgmode.org/manual/Using-the-property-API.html

I've found a few discussions:
- http://comments.gmane.org/gmane.emacs.orgmode/33457
- http://lists.gnu.org/archive/html/emacs-orgmode/2010-02/msg00251.html

I don't have anything working with them, as such,[1] and I was curious 
if anyone did. They don't currently seem to be integrated into 
completion, search functions, Babel, and so on, which would limit 
their usefulness (though searching can be done with regexps). And I 
think implementing wider support for them would run into a problem 
with distinguishing between properties that are meant to be 
multivalued, or and properties that just contain a single value which 
happens to contain spaces.

But handling multiple var=value expressions in a :var: property for 
Babel, as Darlan asked about, might perhaps be doable...? Stuff might 
break, though.

Yours,
Christian


[1] I do have a small research database with some "multivalued" 
properties in it. For queries, I use your org-collector and regular 
expression matching against properties with multiple values. The 
multivalued-properties functions didn't really come into it, except 
that knowing they were there made me go ahead and put multiple values 
in one property. (As it turned out, that wasn't a very good design 
choice.)

On 6/21/11 11:03 PM, Eric Schulte wrote:
> Hi Christian,
>
> That's the first I've heard of that variable?  If you do get something
> working with multivalued properties please do share.
>
> Cheers -- Eric
>
> Christian Moe<mail@christianmoe.com>  writes:
>
>> Hi, Eric,
>>
>> Just curious: What about the org-entry--multivalued-property functions
>> mentioned in "Using the properties API"?
>>
>> Is anybody using multivalued properties for anything?
>>
>> Yours,
>> Christian
>>
>>
>> On 6/21/11 10:17 PM, Eric Schulte wrote:
>>> Unfortunately org-mode properties only allow a single entry for any
>>> given key, so you can only specify one variable using properties.
>>>
>>> However the following workaround does exist.
>>>
>>> *** alternative
>>>       :PROPERTIES:
>>>       :var:      vars=variables
>>>       :END:
>>>
>>> #+tblname: variables
>>> | var1 | 1 |
>>> | var2 | 2 |
>>>
>>> #+begin_src python
>>>     print vars[0][1]
>>>     print vars[1][1]
>>> #+end_src
>>>
>>> Best -- Eric
>>>
>>> Darlan Cavalcante Moreira<darcamo@gmail.com>   writes:
>>>
>>>> I'm using org-babel to automate a few tasks and I'd like to define a few
>>>> variables that are common to several code blocks as sub-tree properties.
>>>>
>>>> It works when I have only one variable, where I can use
>>>> * Heading
>>>>     :PROPERTY:
>>>>     :var: variable1="value1"
>>>>     :END:
>>>>     #+begin_src python :results output
>>>>       print variable1
>>>>     #+end_src
>>>>
>>>>     #+results:
>>>>     : value1
>>>>
>>>> Is it possible to set multiples variables in this way?
>>>> I tried things like
>>>> :PROPERTY:
>>>> :var: variable1="value1" variable2="value2"
>>>> :END:
>>>>
>>>> :PROPERTY:
>>>> :var: variable1="value1",variable2="value2"
>>>> :END:
>>>>
>>>> :PROPERTY:
>>>> :variable1: "value1"
>>>> :variable2: "value2"
>>>> :END:
>>>> but none of them worked.
>>>>
>>>>
>>>> --
>>>> Darlan Cavalcante
>>>>
>>>
>>
>