Re: [ANN] BREAKING CHANGE -- removing #+BABEL file-wide property lines

[Rainer M Krug <r.m.krug@gmail.com>]

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On Fri, Oct 21, 2011 at 12:47 PM, Christian Moe <mail@christianmoe.com>wrote:

> On 10/21/11 11:12 AM, Rainer M Krug wrote:
>
>>
>>
>> On Fri, Oct 21, 2011 at 10:14 AM, Christian Moe <mail@christianmoe.com
>> <mailto:mail@christianmoe.com>**> wrote:
>>
> (...)
>
>     2. Allowing you to pass multiple buffer-wide arguments with :var.
>>    This could make a substantive difference in some applications. The
>>    following will work:
>>
>>      #+BABEL: :var euro=1.3791 :var salestax=.15
>>
>>    The following will not, since it tries to set the same property:
>>
>>      #+PROPERTY: var euro=1.3791
>>      #+PROPERTY: var salestax=.15
>>
>>
>> I think it is a very important point, that the construct with :var
>> still works - but as Eric only mentioned the *naming*, I assume that
>> in the actual usage nothing changes.
>>
>>
> Hi, Rainer,
>
> My point was that there is at least one (minor) case where properties are
> not functionally equivalent to the BABEL line: You cannot pass arguments for
> more than one variable buffer-wide, because you can't have multiple var
> properties at the same time, and at present, one var property only sets one
> variable.
>

So, using your above mentioned example, after the first PROPERTY line,
euro=1.3795 and SALESTAX not set, while after the second one salestax=.15,
and euro is unset? That would be quite bad.


>
> The behavior of properties has not changed. What has changed is the removal
> of the BABEL header, whose colon (:var) syntax did allow you to set multiple
> variables buffer-wide should you wish to.
>

To clarify: before, we could use #+BABEL and #PROPERTY to do similar things.
Now the whole #+BABEL has been removed, and only the functionality from
#+PROPERTY is left - correct?

Rainer



>
> Yours,
> Christian
>
>
>
>
>


-- 
Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology,
UCT), Dipl. Phys. (Germany)

Centre of Excellence for Invasion Biology
Stellenbosch University
South Africa

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