Hi Eric,

This is neat, but it doesn't directly address the problem posed by the  
OP.

Currently, the LaTeX exporter uses \hline for all the horizontal rules  
in a table.  Booktabs defines three rules of different thickness for  
use at the top of the table, after the column heads, and at the bottom  
of the table.  So, one would want a function that let each of the  
rules take a different value.  The default for each could be hline,  
giving the current behavior of the exporter.  Francesco Pizzolante set  
this out nicely a while back: http://www.mail-archive.com/emacs-orgmode@gnu.org/msg18311.html 
  in a message that Seb Vauban brought up in a slightly different  
context.

All the best,
Tom

On Jun 27, 2010, at 7:09 PM, Eric Schulte wrote:

> One way to deal with this without adding even more complexity to the
> core of org-mode could be through the use of "Library of Babel"
> functions.
>
> The attached org-mode file provides a function for exporting to the
> longtable environment with some example usage.  If this looks  
> generally
> useful it (and maybe similar functions) could be added to the  
> library of
> babel distributed w/Org-mode.
>
> What do you think? -- Eric
>
> <longtable.org>
> Sébastien Vauban <wxhgmqzgwmuf@spammotel.com> writes:
>
>> Hi Erik,
>>
>> Erik Butz wrote:
>>> I found a very old thread on the list about using the booktabs  
>>> package to
>>> have nicer tables in latex export.
>>>
>>> I found that, making the changes below I can use the booktab  
>>> package to
>>> export tables, and using standard tables only, this seems to work  
>>> fine.
>>>
>>> Can anyone advice on whether this kind of change is meaningful or  
>>> if this is
>>> likely to introduce difficulties elsewhere which I did not  
>>> experience due to
>>> the limited scope of usage? It should be said that I did not at  
>>> all look
>>> into longtables so far.
>>
>> While trying to improve this, I think one could extend it so that  
>> the table
>> environment can be changed as well, from `tabular' to `array',  
>> `tabular*',
>> `tabularx' or any other.
>>
>> There was a discussion on this, a while ago, by Francesco  
>> Pizzolante. Have a
>> read at: http://www.mail-archive.com/emacs-orgmode@gnu.org/msg18311.html 
>> .
>>
>> Best regards,
>>  Seb
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