Subject: Re: [xsl] Need an XPath expression for: $B is not contained in $A From: "Dimitre Novatchev dnovatchev@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> Date: Thu, 14 Jun 2018 21:17:45 -0000 |
Hi Wendell, > "empty($A intersect $B//*)" I think that generally using the ancestor-or-self:: axis will be more efficient than using $B//*, because the depth of an XML document tends to be fairly limited in size. So: ($B/ancestor-or-self::* intersect $A)[1] Cheers, Dimitre On Thu, Jun 14, 2018 at 1:34 PM, Wendell Piez wapiez@xxxxxxxxxxxxxxx <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote: > > Hi, > > "not(some $b in ($B//*) satisfies ($b is $A))" > > (oh Roger came up with that.) > > or nicer? > > "empty($A intersect $B//*)" > > XPath 1.0: > > "count($B/**) = count($B//* | $A)" > > Cheers, Wendell > > > > On Thu, Jun 14, 2018 at 8:23 AM, Costello, Roger L. costello@xxxxxxxxx > <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote: > > Hi Folks, > > > > The variable $A contains an element. > > > > The variable $B contains an element. > > > > I need an XPath expression that determines if $B is not contained in $A. > > > > This XPath expression seems to work: > > > > not(index-of($B/ancestor::*,$A)) > > > > but that seems awful, i.e., not straightforward, convoluted, and probably inefficient. > > > > Is there a better (simpler, straightforward, efficient) XPath expression? > > > > /Roger > > > > > > -- > Wendell Piez | http://www.wendellpiez.com > XML | XSLT | electronic publishing > Eat Your Vegetables > _____oo_________o_o___ooooo____ooooooo_^ > -- Cheers, Dimitre Novatchev --------------------------------------- Truly great madness cannot be achieved without significant intelligence. --------------------------------------- To invent, you need a good imagination and a pile of junk ------------------------------------- Never fight an inanimate object ------------------------------------- To avoid situations in which you might make mistakes may be the biggest mistake of all ------------------------------------ Quality means doing it right when no one is looking. ------------------------------------- You've achieved success in your field when you don't know whether what you're doing is work or play ------------------------------------- To achieve the impossible dream, try going to sleep. ------------------------------------- Facts do not cease to exist because they are ignored. ------------------------------------- Typing monkeys will write all Shakespeare's works in 200yrs.Will they write all patents, too? :) ------------------------------------- Sanity is madness put to good use. ------------------------------------- I finally figured out the only reason to be alive is to enjoy it.
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