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Daniel Zingaro wrote:
> Hi all,
> From section 6 of the XML spec, I have learned that:
> * binds tighter than |
> + binds tighter than |
> but there is no mention of the precedence of the '-' (set difference)
> operator. At least for me, this makes reading the spec pretty tricky
> (since I don't
> know much XML yet). Could someone explain where '-' fits in, perhaps by
> using the document ::= production, using () to clearly show how '-'
works?
In the uses of - precedence doesn't matter. The - doesn't occur in the
document production. Since you know what set difference is, consider the
production
[14] CharData ::= [^<&]* - ([^<&]* ']]>' [^<&]*)
CharData describes the set of all strings that contain any sequence of
zero or more characters that do not include the '<' or '&' characters,
excluding the set of such strings that contain the substring ']]>'. IOW,
CharData ends before the next occurrence of '<' or '&' and cannot
contain ']]>'.
Bob Foster
http://xmlbuddy.com
> Thanks!!
> Dan
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