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Re: [xsl] enclosing consecutive XHTML heading elements into
, etc.


Subject: Re: [xsl] enclosing consecutive XHTML heading elements into <hgroup />, etc.
From: Wendell Piez <wapiez@xxxxxxxxxxxxxxx>
Date: Thu, 12 Sep 2013 13:26:35 -0400

Ivan,

This is much much easier in XSLT 2.0 using xsl:for-each-group. In this
case, I'd consider and test @group-starting-with="a | aa".

All by itself this capability is sufficient reason to use XSLT 2.0
whenever possible. I hope this option is available to you.

Cheers, Wendell


Wendell Piez | http://www.wendellpiez.com
XML | XSLT | electronic publishing
Eat Your Vegetables
_____oo_________o_o___ooooo____ooooooo_^


On Wed, Sep 11, 2013 at 5:18 AM, Ivan Shmakov <oneingray@xxxxxxxxx> wrote:
>         Long story short: the input XML has spans of elements which are
>         to be enclosed within elements of some other kind, as in:
>
>    <!-- Input -->
>    <doc>
>      <a /><a /><b /><b />
>      <foo>
>        <a /><b /><b />
>        <aa /><a /><b />
>      </foo>
>    </doc>
>
>    <!-- Output -->
>    <doc>
>      <enclosing>
>        <a /><a /><b /><b />
>        <foo>
>          <enclosing><a /><b /><b /></enclosing>
>          <enclosing><aa /><a /><b /></enclosing>
>        </foo>
>      </enclosing>
>    </doc>
>
>         Is there a simple way to do that, given that the set of the
>         elements which can start such a span is finite (<a /> and <aa />
>         in the example above), but they can otherwise occur anywhere?
>         FWIW, Ibm constrained to XSLT 1.0.
>
>         The overall task is to introduce <article />, <section />,
>         <header />, and <hgroup /> elements, as per the following
>         example.
>
>         Input:
>
> <?xml version="1.0"?>
> <html xmlns="http://www.w3.org/1999/xhtml">
>   <head><title>Hello, world!</title></head>
>   <body>
>     <h3>The well-known</h3>
>     <h1>Hello, world!</h1>
>     <h2>program</h2>
>
>     <p>Here we discuss the generalsb&</p>
>
>     <h2>J. R. Hackerbs implementation</h2>
>
>     <p>And here are the particularsb&</p>
>   </body>
> </html>
>
>         Expected output:
>
> <?xml version="1.0"?>
> <html xmlns="http://www.w3.org/1999/xhtml">
>   <head><title>Hello, world!</title></head>
>   <body>
>     <article>
>       <header>
>         <hgroup>
>           <h3>The well-known</h3>
>           <h1>Hello, world!</h1>
>           <h2>program</h2>
>         </hgroup>
>       </header>
>
>       <p>Here we discuss the generalsb&</p>
>
>       <section>
>         <header>
>           <h2>J. R. Hackerbs implementation</h2>
>         </header>
>
>         <p>And here are the particularsb&</p>
>       </section>
>     </article>
>   </body>
> </html>
>
>         Or, algorithmically speaking:
>
>         b" enclose the <body /> contents into an <article /> element, if
>           therebs none;
>
>         b" enclose uninterrupted sequences of two or more heading (<h1 />
>           to <h6 />) elements into <hgroup />s;
>
>         b" enclose the resulting <hgroup />s and the (so far unprocessed)
>           singular heading elements into <header />s;
>
>         b" and finally, enclose all the <article /> elements starting
>           with a <header /> element (including one) and stopping at the
>           next <header /> (excluding one) into <section />s; the first
>           <article />bs <header /> is to be excluded.
>
>         My current implementation is at [1], and what makes me wonder is
>         whether itbs possible to avoid a template like the following
>         there:
>
>   <xsl:template
>       match="xhtml:h1[preceding-sibling::*[position () = 1][self::xhtml:h1
or self::xhtml:h2 or self::xhtml:h3 or self::xhtml:h4 or self::xhtml:h5 or
self::xhtml:h6]] | xhtml:h2[preceding-sibling::*[position () =
1][self::xhtml:h1 or self::xhtml:h2 or self::xhtml:h3 or self::xhtml:h4 or
self::xhtml:h5 or self::xhtml:h6]] | xhtml:h3[preceding-sibling::*[position ()
= 1][self::xhtml:h1 or self::xhtml:h2 or self::xhtml:h3 or self::xhtml:h4 or
self::xhtml:h5 or self::xhtml:h6]] | xhtml:h4[preceding-sibling::*[position ()
= 1][self::xhtml:h1 or self::xhtml:h2 or self::xhtml:h3 or self::xhtml:h4 or
self::xhtml:h5 or self::xhtml:h6]] | xhtml:h5[preceding-sibling::*[position ()
= 1][self::xhtml:h1 or self::xhtml:h2 or self::xhtml:h3 or self::xhtml:h4 or
self::xhtml:h5 or self::xhtml:h6]] | xhtml:h6[preceding-sibling::*[position ()
= 1][self::xhtml:h1 or self::xhtml:h2 or self::xhtml:h3 or self::xhtml:h4 or
self::xhtml:h5 or self::xhtml:h6]]"
>       priority="2"
>       >
>     <!-- do nothing -->
>   </xsl:template>
>
>         TIA.
>
> [1] http://am-1.org/~ivan/src/cxw3i61gtnuc78sbufiftcgz5f.xsl
>
> --
> FSF associate member #7257      http://sf-day.org/


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