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
> 



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Wendell Piez | http://www.wendellpiez.com
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