[XSL-LIST Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] RE: XPath: all elements with only non-parent children
> DeMorgan's theorem can be proved by complete induction over all > possible inputs. I don't think it makes any requirements other than > that the functions behave like the boolean opeators they're meant to > emulate. For example, if there were also type conversions involved, > one might need too be careful when applying DeMorgan's theorem to > XPath expressions. I've not actually analyzed whether there would be > any screw-cases here or not. I think de Morgan's law applies correctly to XPath conditional expressions, even when evaluating one of the operands generates an error. Mike Kay XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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