Re: [xsl] XSLT splitting (grouping?) hierarchical structure

["Martin Honnen martin.honnen@xxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

Am 10.02.2022 um 09:40 schrieb Imsieke, Gerrit, le-tex
gerrit.imsieke@xxxxxxxxx:
> Hi Matthieu,
>
> At XML Prague 2019, I presented what I call the "upward projection
> method" [1, 2]. It turned out that Wendell Piez had independently
> developed his own upward projection approach [3, 4]. Both methods
> group the leaf nodes, starting at the splitting points.
>
> Gerrit
>
> [1]
https://archive.xmlprague.cz/2019/files/xmlprague-2019-proceedings.pdf#page=3
47
> [2]
https://subversion.le-tex.de/common/presentations/2019-02-09_xmlprague_xslt-u
pward-projection/slides/index.html


I think Gerrit's approach will help you although I think your set of
restricted-to nodes will be adapted slightly, instead of

B B  current-group()/ancestor-or-self::node()

it seems you want to carry over the section/title from each section.

> [3]
> https://github.com/wendellpiez/MITH_XSLT/blob/master/xslt/p-promote.xsl
> [4]
https://www.biglist.com/lists/lists.mulberrytech.com/xsl-list/archives/202008
/msg00076.html
> On 10.02.2022 09:20, Matthieu Ricaud-Dussarget ricaudm@xxxxxxxxx wrote:
> > Dear XSL List,
> >
> > It's not the first time I'm facing a splittingB problem working with
> > publishing documents.
> > I used to findB kind of tricky/verbose solutions but I'm wondering if
> > I'm missing something obvious, especially with XSLT 3.0 new features ?
> >
> > My XML looks like this :
> > <root>
> > B B  <section>
> > B B  B  <title>Title</title>
> > B B  B  <content>
> > B B  B  B  <p>paragraph #1</p>
> > B B  B  B  <p>paragraph #2 to split <split id="split-1"/> here</p>
> > B B  B  B  <p>paragraph #3</p>
> > B B  B  B  <p>paragraph #4 <strong> to split <split id="split-2"/>
> > here</strong> if possible</p>
> > B B  B  B  <p>paragraph #5</p>
> > B B  B  B  <ul>
> > B B  B  B  B  <li>Item #1</li>
> > B B  B  B  B  <li>Item #2 to split <split id="split-3"/> here</li>
> > B B  B  B  B  <li>Item #3</li>
> > B B  B  B  B  <li>
> > B B  B  B  B  B  <ul>
> > B B  B  B  B  B  B  <li>Item #4</li>
> > B B  B  B  B  B  B  <li>Item #5 to <em>split <split id="split-4"/></em>
here
> > if possible</li>
> > B B  B  B  B  B  B  <li>Item #6</li>
> > B B  B  B  B  B  </ul>
> > B B  B  B  B  </li>
> > B B  B  B  </ul>
> > B B  B  B  <p>paragraph #6</p>
> > B B  B  </content>
> > B B  </section>
> > </root>
> >
> > The goal is to split the section on every <split> element (just like
> > a page would break the flowing text anywhere in the structure).
> >
> > Expected result :
> > <root>
> > B B  B  <section>
> > B B  B  B  <title>Title</title>
> > B B  B  B  <content>
> > B B  B  B  B  <p>paragraph #1</p>
> > B B  B  B  B  <p>paragraph #2 to split</p>
> > B B  B  B  </content>
> > B B  B  </section>
> > B B  B  <split id="split-1"/>
> > B B  B  <section>
> > B B  B  B  <title>Title</title>
> > B B  B  B  <content>
> > B B  B  B  B  <p>paragraph #3</p>
> > B B  B  B  B  <p>paragraph #4 <strong> to split</strong></p>
> > B B  B  B  </content>
> > B B  B  </section>
> > B B  B  <split id="split-2"/>
> > B B  B  <section>
> > B B  B  B  <title>Title</title>
> > B B  B  B  <content>
> > B B  B  B  B  <p><strong> here</strong> if possible</p>
> > B B  B  B  B  <p>paragraph #5</p>
> > B B  B  B  B  <ul>
> > B B  B  B  B  B  <li>Item #1</li>
> > B B  B  B  B  B  <li>Item #2 to split </li>
> > B B  B  B  B  </ul>
> > B B  B  B  </content>
> > B B  B  </section>
> > B B  B  <split id="split-3"/>
> > B B  B  <section>
> > B B  B  B  <title>Title</title>
> > B B  B  B  <content>
> > B B  B  B  B  <ul>
> > B B  B  B  B  B  <li> here</li>
> > B B  B  B  B  B  <li>Item #3</li>
> > B B  B  B  B  B  <li>
> > B B  B  B  B  B  B  <ul>
> > B B  B  B  B  B  B  B  <li>Item #4</li>
> > B B  B  B  B  B  B  B  <li>Item #5 to <em>split</em></li>
> > B B  B  B  B  B  B  </ul>
> > B B  B  B  B  B  </li>
> > B B  B  B  B  </ul>
> > B B  B  B  </content>
> > B B  B  </section>
> > B B  B  <split id="split-4"/>
> > B B  B  <section>
> > B B  B  B  <title>Title</title>
> > B B  B  B  <content>
> > B B  B  B  B  <ul>
> > B B  B  B  B  B  <ul>
> > B B  B  B  B  B  B  <li> here if possible</li>
> > B B  B  B  B  B  </ul>
> > B B  B  B  B  B  <li>Item #6</li>
> > B B  B  B  B  </ul>
> > B B  B  B  B  <p>paragraph #6</p>
> > B B  B  B  </content>
> > B B  B  </section>
> > B B  </root>
> >
> > My idea was to iterate from 1 to the number of split elementsB + 1 and
> > working on the section with tunnel params so I can test for each node
> > if it's before / after / in betweenB (current) splits elements, and
> > then decide to keep the node or not according to this position.
> >
> > I already used this kind of solution on a similar problem, long time
> > ago. So I'll give it a try thoughB I'm not not totally confident with
> > it (because split elements can appear as inline content here).
> >
> > Please let me know if you have ideas, if my solution is the right or
> > wrong way to go?
> > Are there special design patterns for this kind of problem ?
> > And last, haveB you ever faced this kind of splittingB issue, any
> > feedbackB welcome :)
> >
> > Cheers,
> > Matthieu Ricaud-Dussarget