[antlr-interest] Re: RTF spec/grammar in (E)BNF
lgc at mail1.jpl.nasa.gov
Tue Oct 29 17:25:33 PST 2002
My grammar is pretty ancient (vsn 1.3 of the spec--the current vsn is
1.6) and it took heavy advantage of the RTF backwards compatibility
design policy "if you don't recognize it, ignore it". I didn't need
to parse headers so I ignored them; I just needed to recognize
critical parts of the document.
If you look at the Microsoft RTF spec at
spec/html/rtfspec.asp, you will find that there is a complete EBNF
spec in the document. To get at it, you will have to download each
section separately (or so it appears). (I got the earlier version in
doc format before they put it in HTML and made it impossible to
download all at once).
One useful trick: I wrote a simple language to build a table of RTF
commands which associated a processing type with each command. That
helped considerably to reduce the size of the lexer and parser
--- In antlr-interest at y..., Terence Parr <parrt at j...> wrote:
> On Monday, October 28, 2002, at 09:05 PM, Spenser Kao wrote:
> > Hi,
> > I wonder if there is a showcase of implementing a RTF (Rich Text
> > Format) reader in ANTLR.
> > The core part of the job is to express RTF spec/grammar in (E)BNF,
> > any one done that before?
> Loring at NASA may be able to release his old PCCTS RTF grammar.
> Co-founder, http://www.jguru.com
> Creator, ANTLR Parser Generator: http://www.antlr.org
> Lecturer in Comp. Sci., University of San Francisco
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