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

["Costello, Roger L. costello@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

Do you see any problems with using this XPath to solve the problem:

not(some $i in $B/ancestor::* satisfies $i is $A)

/Roger

-----Original Message-----
From: Costello, Roger L. costello@xxxxxxxxx
[mailto:xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx]
Sent: Thursday, June 14, 2018 9:10 AM
To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
Subject: Re: [xsl] Need an XPath expression for: $B is not contained in $A

Martin Honnen wrote:



> If you have (element) nodes I fail to see how the index-of function helps



Eek! You are right.



> Don't you need index-of-node?



That is an XPath 3.0 function. I need to stick with XPath 2.0. Suggestions?



/Roger



-----Original Message-----

From: Martin Honnen martin.honnen@xxxxxx
[mailto:xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx]

Sent: Thursday, June 14, 2018 8:52 AM

To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx

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



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?