Trying to get an overview of the LaTeX source code base

Arno Trautmann arno.trautmann at
Thu May 12 15:55:23 CEST 2022

Hi Aaron,

there is also my attempt to give an overvie over the TeX-world as much
as I have one myself, maybe that also helps:

(texdoc tex-overview should also give you the document on your computer)

It's not fully up to date as I don't have the capabilities to keep up
with recent developments, I'm always glad for contributions.


On 5/10/22 23:44, Aaron Gray wrote:
> Thanks all !
> Aaron
> On Fri, 6 May 2022 at 23:20, Karl Berry <karl at> wrote:
>>       KerTeX (restricted to a BSD license and
>>      therefore suitable in places that GPL code is not acceptable).
>> KerTeX's license has an advertising clause (like original BSD) that
>> makes it incompatible with all copyleft licenses, and probably
>> unacceptable in practice for the big app stores or anywhere else
>> "commercial".
>> That is not what most people think of as the "BSD license" (for several
>> decades now), which is modified BSD, that is, modified specifically to
>> remove the advertising clause.
>> Happily, Thierry agreed to release the Prote extensions under the
>> standard MIT/X11 license (like XeTeX), so Martin could use them in HiTeX. -k

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