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Re: [xsl] Need an XPath expression for: $B is not contained in $A

Subject: Re: [xsl] Need an XPath expression for: $B is not contained in $A
From: "Martin Honnen martin.honnen@xxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>
Date: Thu, 14 Jun 2018 12:51:44 -0000
On 14.06.2018 14:22, Costello, Roger L. costello@xxxxxxxxx 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.

If you have (element) nodes I fail to see how the index-of function helps that works on sequences and uses "eq" comparison helps to check containment? Don't you need https://www.w3.org/TR/xpath-functions/#index-of-node?

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