Hello,

On Mon, Dec 3, 2018 at 5:28 AM Van L <van@scratch.space> wrote:

>  > As already pointed out by Nicolas Goaziou, org-mode also requires other
>  > external stuff
>
> A data point.
>
> Ditaa requires a JRE as mentioned at
>
>   http://orgmode.org/worg/org-contrib/babel/languages/ob-doc-ditaa.html
>
> The litigious terms are
>
>   ditaa version 0.9, Copyright (C) 2004--2009  Efstathios (Stathis) Sideris
>
> I didn’t find ditaa.jar in org-mode’s contrib/scripts as claimed.
>

I can't speak for why it is/isn't in the contrib/scripts directory, but if
you go to Github
for the most up to date version it is GPLv3
https://github.com/stathissideris/ditaa/blob/master/LICENSE

Regards,
Jon