Re: About the use of PROPERTY "meta lines"...

["Sebastien Vauban" <wxhgmqzgwmuf-geNee64TY+gS+FvcfC7Uqw@public.gmane.org>]

Hi Eric and all,

Eric Schulte wrote:
> "Sebastien Vauban" <wxhgmqzgwmuf-geNee64TY+gS+FvcfC7Uqw@public.gmane.org> writes:
>
>> #+TITLE:     Properties
>> #+AUTHOR:    Seb Vauban
>> #+PROPERTY: var  foo=1
>> #+PROPERTY: var+ bar=2
>>
>> * Abstract
>>
>> IIUC, properties are set in this way:
>>
>> - on a file basis, before any heading, through the =PROPERTY= keyword,
>> - on a subtree basis, through the =PROPERTIES= block.
>>
>> My comprehension is that the =PROPERTY= keyword may not be used inside "trees",
>> and should be ignored if that would happen.
>
> While it is not normal usage, I think that it is legal for #+PROPERTY:
> lines (or #+Option: lines etc...) to appear inside of subtrees.

I realize this is not especially a Babel question, but more a Org core
question...

Thanks for your answer -- which generates a new one, though: what is then the
expected *semantics* of such a construct?

There are at least 3 different views on such a construct: putting a PROPERTY
line inside a subtree...

- ... resets some values from that point up to the end of the subtree
- ... resets some values from that point up to the end of the buffer
- ... defines some values which can have already been by the subtree

Best regards,
  Seb

>> The following example shows that either:
>>
>> - I'm wrong to think so,
>> - there is a bug.
>>
>> What is the right assumption here?
>>
>> * Subtree
>>
>> Being located in a subtree, the following lines are ill-placed IMHO:
>>
>> #+PROPERTY: var  foo="Hello
>> #+PROPERTY: var+ world"
>>
>> Though, they're well taken into account:
>>
>> #+begin_src emacs-lisp
>>   foo
>> #+end_src
>>
>> #+results:
>> : Hello world
>>
>> These lines have even wiped the definition of =bar= (because of the use of =var=
>> without any =+=):
>>
>> #+begin_src emacs-lisp
>>   (+ foo bar)
>> #+end_src
>>
>> returns the error "Symbol's value as variable is void: bar."

-- 
Sebastien Vauban