xsl-list
[Top] [All Lists]

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

2022-02-10 02:40:24
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=347 [2] https://subversion.le-tex.de/common/presentations/2019-02-09_xmlprague_xslt-upward-projection/slides/index.html
[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(_at_)gmail(_dot_)com 
wrote:
Dear XSL List,

It's not the first time I'm facing a splitting problem working with publishing documents. I used to find 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>
   <section>
     <title>Title</title>
     <content>
       <p>paragraph #1</p>
       <p>paragraph #2 to split <split id="split-1"/> here</p>
       <p>paragraph #3</p>
      <p>paragraph #4 <strong> to split <split id="split-2"/> here</strong> if possible</p>
       <p>paragraph #5</p>
       <ul>
         <li>Item #1</li>
         <li>Item #2 to split <split id="split-3"/> here</li>
         <li>Item #3</li>
         <li>
           <ul>
             <li>Item #4</li>
            <li>Item #5 to <em>split <split id="split-4"/></em> here if possible</li>
             <li>Item #6</li>
           </ul>
         </li>
       </ul>
       <p>paragraph #6</p>
     </content>
   </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>
     <section>
       <title>Title</title>
       <content>
         <p>paragraph #1</p>
         <p>paragraph #2 to split</p>
       </content>
     </section>
     <split id="split-1"/>
     <section>
       <title>Title</title>
       <content>
         <p>paragraph #3</p>
         <p>paragraph #4 <strong> to split</strong></p>
       </content>
     </section>
     <split id="split-2"/>
     <section>
       <title>Title</title>
       <content>
         <p><strong> here</strong> if possible</p>
         <p>paragraph #5</p>
         <ul>
           <li>Item #1</li>
           <li>Item #2 to split </li>
         </ul>
       </content>
     </section>
     <split id="split-3"/>
     <section>
       <title>Title</title>
       <content>
         <ul>
           <li> here</li>
           <li>Item #3</li>
           <li>
             <ul>
               <li>Item #4</li>
               <li>Item #5 to <em>split</em></li>
             </ul>
           </li>
         </ul>
       </content>
     </section>
     <split id="split-4"/>
     <section>
       <title>Title</title>
       <content>
         <ul>
           <ul>
             <li> here if possible</li>
           </ul>
           <li>Item #6</li>
         </ul>
         <p>paragraph #6</p>
       </content>
     </section>
   </root>

My idea was to iterate from 1 to the number of split elements + 1 and working on the section with tunnel params so I can test for each node if it's before / after / in between (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 though 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, have you ever faced this kind of splitting issue, any feedback welcome :)

Cheers,
Matthieu Ricaud-Dussarget

--~----------------------------------------------------------------
XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
EasyUnsubscribe: http://lists.mulberrytech.com/unsub/xsl-list/1167547
or by email: xsl-list-unsub(_at_)lists(_dot_)mulberrytech(_dot_)com
--~--

<Prev in Thread] Current Thread [Next in Thread>