xml-dev - Re: BNF operator precedence in XML spec

[Shekhar Kshirsagar <skshirsa@nortelnetworks.com>]

Hi,

I tried to find the examples of ambiguity in the grammar for XML spec,
couldn't find too many.

One of the example is :

PubidLiteral ::=  '"' PubidChar* '"' | "'" (PubidChar - "'")* "'" 

I'm sure the expected precedence rules here are :

PubidLiteral ::=  ('"' PubidChar* '"') | ("'" (PubidChar - "'")* "'")

And so if it is consistent, it looks like that AB | C should be parsed as
(AB) | C.


Thanks & Regards,
Shekhar Kshirsagar
Nortel Networks





At 10:08 AM 1/28/99 -0500, mlamb@roinet.com wrote:
>
>     I've been working on an XML processor that I
> wish to base directly upon the BNF in the XML spec.
> I've reached an obstacle in that the operator precedence
> is not outlined in this spec, and after searching the
> Internet for more information, I was only able to find
> a posting to this group with the same question.  For
> example, should "A B | C" in the BNF be parsed as
> "(A B) | C" or "A (B | C)" ?
>
>     Any information would be appreciated.
>
>- Marty Lamb
>
>
>
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