ConTeXt is not an engine but that is a format just like LaTeٓ is.

On Fri, Oct 21, 2011 at 2:25 AM, Peter Dyballa <peter_dyba...@web.de> wrote:

>
> Am 20.10.2011 um 16:54 schrieb Chris Travers:
>
> > One of the other commentors talks about documents that don't render on
> > all versions of TexLive.  If a client of mine is depending on this
> > working, upgrading the various stuff from CTAN in order to get a
> > security fix in an underlying program is a non-starter because it may
> > break things, just as it breaks other documents.
>
> You're mixing up things! TeX is a set of a few binaries, some of them are
> the TeX engines (pdfTeX, XeTeX, LuaTeX, conTeXt). The majority of the TeX
> software are text files. If a change in a library is breaking the TeX
> engine, then the change itself is faulty. If you're using a TeX function
> (library call) of a future version of that software, then something has to
> fail. If you're using an old function (library call) that has been changed,
> then you can't assume something useful will happen to come out.
>
> --
> Greetings
>
>  Pete
>
> Life is the only flaw in an otherwise perfect nonexistence
>                                – Schopenhauer
>
>
>
>
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