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   Re: [xml-dev] Unclear Part of XML 1.1 Specification

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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 '-' 

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 

[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

 > Thanks!!
 > Dan


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