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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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