On Wed, 29 Apr 2009 20:00:07 +0200
luigi scarso <luigi.sca...@gmail.com> scribit:

> On Wed, Apr 29, 2009 at 6:46 PM, R. Bastian <rbast...@free.fr> wrote:
> 
> > On Wed, 29 Apr 2009 17:55:05 +0200
> > luigi scarso <luigi.sca...@gmail.com> scribit:
> >
> > > >
> > > >
> > > > May be that ConTeXt is not a 'context free language'  ;-)
> > > > than it will be difficult to express something in a BNF grammar
> > > > http://en.wikipedia.org/wiki/Backus-Naur_form.
> > > >
> > > hmm.
> > > Context is a macro package in TeX language which is Turing Complete.
> > >
> > >
> > > > But if (ConTeXt == formal_language), it should be possible to
> > > > develop TEXT, NUMBER, DIMENSION, REFERENCE, etc
> > > > and also to add examples for "[optional user data]".
> > > >
> > > hmm
> > > I'm not sure that ConTeXt == TeX (but it seems YES) ,
> > > I'm nor sure that TeX is a context free language too,
> > > in the sense that I never see a BNF grammar of TeX .
> > (chap.24-26 of the Texbook are embryos of a grammar, but they are not
> > usable
> > like the grammar of Pascal or Python)
> > > I suspect that TeX is not a cfl .
> > >
> > > Anyway,
> > > lpeg can make the thing easier
> > >
> > > --
> > > luigi
> >
> 
> 
> >
> > I think that something user-friendly could be do in a cooperative wiki (in
> > the between, i found
> > http://texshow.contextgarden.net/) beginning with
> >
> > CONTEXT_SOURCE ::= PREAMBLE "\starttext" TEXT "\stoptext" | CONTEXT_SOURCE
> > TEXT ::= STARTSTOPS | SETUPS | DEFINES | OTHERS [ TEXT
> >
> > and so on.
> >
> Consider that one can always make some dirty tricks in PREAMBLE to render
> useless
> "\starttext"
> or "\stoptext"
> 
> To be general, i think
> MY_CONTEXT_SOURCE ::= MACRO* END
> 
> For example , let's try
> $>context test
> where
> test.tex ::="\end"
> or
> test.tex ::="FOO\end"
> 
> Are there any errors ? No
> Is test.tex  in {CONTEXT_SOURCE } ? No
> Is test.tex in {MY_CONTEXT_SOURCE} Yes
> so MY_CONTEXT_SOURCE includes CONTEXT_SOURCE
> (of course
> test.tex ::="\end""\starttext""\stoptext" is also in {CONTEXT_SOURCE }
> )

I dont understand the sense of "\end\starttext" (I am simply seeking a
layout system which works better than Latex). 
> 
> I think that a bnf or lpeg grammar is really useful for a sort of
> standard-ConTeXt
> or minimal-ConTeXt or light-ConTeXt
> ie a ConTeXt to use as "reference"

Exactly what I need : standard, minimal and light

> but can be a bit hard to define
> 
> -- 
> luigi

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