Re: [xsl] Find First Descendants That Match Predicate?

["Wendell Piez wapiez@xxxxxxxxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

Hi,

How about

.//*[title] except .//*[title]//*[title]

? (or the same along descendant:: )

Cheers, Happy Solstice, etc. Wendell

On Mon, Dec 24, 2018 at 5:34 PM Eliot Kimber ekimber@xxxxxxxxxxxx
<xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> Thanks--setting the $here variable was the trick I was failing to see.
>
> Cheers,
>
> E.
>
> --
> Eliot Kimber
> http://contrext.com
>
>
> o;?On 12/24/18, 3:31 PM, "David Carlisle d.p.carlisle@xxxxxxxxx"
<xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:
>
>     given
>
>     <root>
>       <chapter><title>C1</title>
>       <wrapper>
>         <wrapper>
>             <section><title>S1</title></section>
>         </wrapper>
>         <section><title>S2</title>
>           <section><title>S3</title>
>           </section>
>         </section>
>       </wrapper>
>       </chapter>
>     </root>
>
>
>     (I moved /chapter to the end?)
>
>     and
>
>     <xsl:stylesheet version="3.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
>
>
>      <xsl:template match="chapter">
>
>      <xsl:message select="
>     let $here:=. return
>     .//section[empty(ancestor::*[title] except
>     $here/ancestor-or-self::*[title])]/title
>     "/>
>
>      </xsl:template>
>
>     </xsl:stylesheet>
>
>
>     the xpath in the message produces
>
>     <title>S1</title><title>S2</title>
>
>     David
>
>     On Mon, 24 Dec 2018 at 21:13, Graydon graydon@xxxxxxxxx
>     <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:
>     >
>     > On Mon, Dec 24, 2018 at 08:57:40PM -0000, Eliot Kimber
ekimber@xxxxxxxxxxxx scripsit:
>     > > Using XPath 3:
>     > [snip]
>     > > Given a starting node, e.g., the root node (but could be any node in
the hierarchy) I need to find the first titled "child" nodes, so given the
chapter node  I need to find S1 and S2 but not S3.
>     >
>     > If you meant:
>     >
>     > <root>
>     >     <chapter><title>C1</title>
>     >     <wrapper>
>     >         <wrapper>
>     >             <section><title>S1</title>
>     >             </section>
>     >         </wrapper>
>     >         <section><title>S2</title>
>     >             <section><title>S3</title>
>     >             </section>
>     >         </section>
>     >     </wrapper>
>     >     </chapter>
>     > </root>
>     >
>     > then
>     >
//descendant::*[self::section][title][not(ancestor::*[self::section][title])]
>     >
>     > will give you the first titled element of the type you're looking
for.
>     >
>     > You'll need to put the actual values for "foo" and "bar" in where
there's a predicate for [self::section]; [self:foo or self::bar]
>     >
>     > -- Graydon
>     >
>
>
>
>



--
Wendell Piez | wendell -dot- piez -at- nist -dot- gov |
http://www.wendellpiez.com
pellucidliterature.org | github.com/wendellpiez |
gitlab.coko.foundation/wendell  - pausepress.org