Re: PowerLoom's BNF usage

Just thought I'd point out that Common Logic is now an ISO standard and can
be downloaded free of charge from here:
http://standards.iso.org/ittf/PubliclyAvailableStandards/c039175_ISO_IEC_24707_2007(E).zip.
Are there any plans, or is there any interest in evolving PL-KIF to the
Common Logic CLIF dialect?  Does this even make sense?

Cameron Ross.



On Fri, Jul 4, 2008 at 12:00 PM, Hans Chalupsky <[email protected]> wrote:

> Rich,
>
> the PowerLoom grammar was developed by a motivated visitor to our
> group, but we never scrutinized it much nor used it for anything, so
> it probably is incomplete, inconsistent and not quite up-to-date.
> Given that more people are getting serious about using it, we should
> fix that, firm it up and bring it in-line with the upcoming
> Common-Logic standard.  That would also address the character set
> questions you voiced previously.
>
> With respect to the questions below, the only thing incorrect was your
> interpretation of braces, which we use as a grouping construct.  Since
> they also mean something in Texinfo and require proper quoting, it
> looks like some of them didn't survive into the formatted version of
> the manual, we need to fix that.
>
> Hans
>
> >>>>> Rich Morin <[email protected]> writes:
>
> > I've been digging into Chapter 11 of the manual, in order to
> > write a second-level parser (ie, recognize logsent, etc.).
>
> > The BNF isn't exactly standard (or even correct in some places),
> > so I have been getting confused about some rather basic things.
> > Can someone confirm or deny (and then clarify) these statements?
>
> > asterisk "*"
>
> >   An asterisk means "zero or more of this item".
>
> > braces "{...}"
>
> >   Braces mean "zero or more of these items".
>
> > brackets "[...]"
>
> >   Brackets mean "zero or one of these items".
>
> > parentheses "(...)"
>
> >   Parentheses stand for themselves,
> >   rather than acting as grouping operators.
>
> > plus sign "+"
>
> >   A plus sign means "one or more of this item".
>
> > -r
> > --
> > http://www.cfcl.com/rdm            Rich Morin
> > http://www.cfcl.com/rdm/resume     [email protected]
> > http://www.cfcl.com/rdm/weblog     +1 650-873-7841
>
> > Technical editing and writing, programming, and web development
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-- 
Cameron Ross, M.Sc.
Director of Technology
Symboticware Incorporated
www.symboticware.com

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