CEDET

I am working towards a Wisent parser for RELAX NG compact syntax, which is
one of the two renditions of the RELAX NG schema language for XML.  (See
http://www.relaxng.org/ for further info about RELAX NG.)

The code is on GitHub at https://github.com/tkg/nrnc.

The BNF from the ISO spec [1] is at
https://github.com/tkg/nrnc/blob/master/bnf.txt

It's at the "it sort-of works" stage (for as much as has been implemented
so far), so any and all feedback would be appreciated.

More specifically, RELAX NG consists largely of 'pattern' definitions and
although, e.g., the BNF includes:

pattern ::=
("element" nameClass "{" pattern "}")
| ("attribute" nameClass "{" pattern "}")
| (pattern ("," pattern)+)
| (pattern ("&" pattern)+)
| (pattern ("|" pattern)+)
...

a sequence of patterns between "{" and "}" can't mix ",", "&", and "|" as
the separator between patterns.  E.g., you can't have "{ a, b & c}".  How
can that best be handled using Wisent?

Regards,


Tony Graham.

[1]
http://standards.iso.org/ittf/PubliclyAvailableStandards/c052348_ISO_IEC_19757-2_2008(E).zip

Re: [CEDET-devel] Wisent parser for RELAX NG compact syntax From: David Engster <deng@ra...> - 2012-04-26 21:08 Tony Graham writes: > More specifically, RELAX NG consists largely of 'pattern' definitions and > although, e.g., the BNF includes: > > pattern ::= > ("element" nameClass "{" pattern "}") > | ("attribute" nameClass "{" pattern "}") > | (pattern ("," pattern)+) > | (pattern ("&" pattern)+) > | (pattern ("|" pattern)+) > ... > > a sequence of patterns between "{" and "}" can't mix ",", "&", and "|" as > the separator between patterns. E.g., you can't have "{ a, b & c}". How > can that best be handled using Wisent? My grammar-fu isn't at its best, but I think you'll have to write three separate rules which allow strictly either COMMA, AND or OR as a separator between patterns? Cheers, David

Re: [CEDET-devel] Wisent parser for RELAX NG compact syntax From: Tony Graham <tgraham@me...> - 2012-04-27 16:27 On Thu, April 26, 2012 10:08 pm, David Engster wrote: > Tony Graham writes: ... >> a sequence of patterns between "{" and "}" can't mix ",", "&", and "|" >> as >> the separator between patterns. E.g., you can't have "{ a, b & c}". >> How >> can that best be handled using Wisent? > > My grammar-fu isn't at its best, but I think you'll have to write three > separate rules which allow strictly either COMMA, AND or OR as a > separator between patterns? Thanks. That did seem the most likely answer, but I don't know enough to say that there wouldn't be others. For example, I catch that now with the original `rnc-mode' by adding a hook to get `flymake-mode' to run 'jing'. Regards, Tony Graham tgraham@... Consultant http://www.mentea.net Mentea 13 Kelly's Bay Beach, Skerries, Co. Dublin, Ireland -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- XML, XSL-FO and XSLT consulting, training and programming

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