On 8/3/22 09:09, Taco Hoekwater via ntg-context wrote:

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On 2 Aug 2022, at 21:14, Pablo Rodriguez via ntg-context wrote: [...] I need an lpath to select the h3 node above, but only the one with "h3 + blockquote" as a CSS selector (which could be added the lpath "../h3" after).

Lpath supports CSS selectors between curly braces as parts, so simply:

\xmlsetsetup{#1}{{h3 + blockquote}/../h3} {xml:section}

Taco, I knew that, but I wasn’t sure how to mix both. I’d say yesterday I tried something similar to: \xmlsetsetup{#1}{{h3 + blockquote}../h3} {xml:section} Which, of course, couldn’t work.

The xml-mkiv.pdf manual has lots of other lpath examples as well.

I know, I have read them many times. And I read them from time to time. But I’m not smart enough to understand them. BTW, is there any way to rephrase "{h3 + blockquote}" in proper Lua? Something like "/h3/../!p/../blockquote" selected both "h3 + p" (which I didn’t want and "h3 + blockquote" (the one intended). Many thanks for your help, Pablo

On 8/4/2022 12:22 PM, Taco Hoekwater via ntg-context wrote:

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On 3 Aug 2022, at 15:54, Pablo Rodriguez via ntg-context wrote:

BTW, is there any way to rephrase "{h3 + blockquote}" in proper Lua?

I was wondering about that as well, and I really had no clue how to do that. Some reading and studying later, I realised that there is a preceding-sibling:: axis.

That is not documented in xml-mkiv.pdf I think, but it inherited from xpath, and that means this works:

\xmlsetsetup{#1}{blockquote/preceding-sibling::h3[-1]/} {xml:section}

“Take all blockquotes, then tests their immediate preceding siblings (index [-1]) that are h3."

But the CSS version is nicer. Still, both solutions fail on generic input.

Sorry, out of clues

\startbuffer[demo] <xml> <div class="section level3"> <h3>One</h3> <p>Standard paragraph</p> <blockquote> <p>Quoted text</p> </blockquote> </div> <div class="section level3"> <h3>Two</h3> <blockquote> <p>Direct quote</p> </blockquote> </div> </xml> \stopbuffer \startxmlsetups xml:initialize \xmlsetsetup{#1} {xml|p|blockquote|div} {xml:*} \xmlsetsetup{#1} {/xml/div[contains(@class,'level3')]} {xml:section:level3} \stopxmlsetups \xmlregistersetup{xml:initialize} \startxmlsetups xml:xml \xmlall{#1}{/div} \stopxmlsetups \startxmlsetups xml:p \startpar\xmlflush{#1}\stoppar \stopxmlsetups \startxmlsetups xml:blockquote \startblockquote\xmlflush{#1}\stopblockquote \stopxmlsetups \startxmlsetups xml:section:level3 \xmldoif{#1}{/blockquote} { \xmldoifnot{#1}{/p} { \section{\xmlflush{#1}} } } \stopxmlsetups \starttext \xmlprocessbuffer{main}{demo}{} \stoptext ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl -----------------------------------------------------------------

On 8/4/22 17:32, Taco Hoekwater via ntg-context wrote:

[...] PS This sort of confusing filtering is why I do most of my xml processing from the lua end, where it is much clearer to me what is what. Many thanks for clarifying the issue, Taco.

BTW, according to the last slide from https://meeting.contextgarden.net/2019/talks/02-xmlprocessing/02-xmlprocessi..., you had plans to document how to deal with XML in proper Lua. I wonder whether you are still interested in adding this information to the manual. Many thanks for your help, Pablo

On 8/4/22 12:22, Taco Hoekwater via ntg-context wrote:

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On 3 Aug 2022, at 15:54, Pablo Rodriguez via ntg-context wrote: BTW, is there any way to rephrase "{h3 + blockquote}" in proper Lua?

I was wondering about that as well, and I really had no clue how to do that. Some reading and studying later, I realised that there is a preceding-sibling:: axis.

That is not documented in xml-mkiv.pdf I think, but it inherited from xpath, and that means this works:> \xmlsetsetup{#1}{blockquote/preceding-sibling::h3[-1]/} {xml:section}

“Take all blockquotes, then tests their immediate preceding siblings (index [-1]) that are h3."

Many thanks for your reply, Taco. It isn’t documented, but I have just discovered that it is used inside a function: https://www.pragma-ade.com/general/manuals/xml-mkiv.pdf#search=sibling

But the CSS version is nicer.

I agree. But using CSS for LPaths feels like cheating to me. Many thanks for your help again, Pablo