Re: C.10 Allow nondeterministic content models?
At 11:46 AM 18/10/96 -0700, Joe English wrote:
>the ambiguity rule can make things *easier* for implementors.)
Say what? The algorithms necessary to detect ambiguity are not typically
within the repertoire of the hypothetical CS bachelor's-degree type that
we'd like to be able to construct a validating parser. Furthermore, with
the parser generators that I have to hand, in no case does an ambiguous
content model complicate the task. Furthermore, since we've lost the
tag miminization that opens the trap that I have been told the ambiguity
exclusion exists to patch, I can't imagine why an XML parser author would
*want* thus to constrain DTD authors, aside from a desire to comply with
a non-useful clause in a standard that is there only to ensure compliance
with another standard, which in any case is likely to be amended soon to
remove this problem.
If it's not obvious, I am deeply unhappy with the prospect of the
restriction on so-called "ambiguous" grammars making it into XML.
Cheers, Tim Bray
firstname.lastname@example.org http://www.textuality.com/ +1-604-488-1167