Re: [xsl] problem creating containment during XHTML->XML

["J.Pietschmann" <j3322ptm@xxxxxxxx>]

Don Stinchfield wrote:
> I'm in the process of breaking up an XHTML file into multiple XML files.
...
>   <heading level="h1"><a name="content" id="content"></a>Overview</heading>
>     <p>On February 20, 1865</p>
...
>   <heading level="h3"><a name="mission" id="mission"></a>Mission</heading>
> I'm cleaning up a bit and would like to add structure as follows...
>
>   <section>
>     <heading level="h1">Overview</heading>
>       <p>On February 20, 1865</p>
...
>   </section>
>   <section>
>     <heading level="h3"></a>Mission</heading>

A kind of grouping problem.

> - <xsl:template match="x:heading">
>   - <section>
>   -   <title>
>         <xsl:value-of select="." /> 
>       </title>
>       <xsl:apply-templates select="following-sibling::*" /> 
...
> The above puts me in an infinite loop.

Not necessarily infinite but certainly O(n^2) behaviour. Think about
it.
Instead of *all* following siblings of a heading, you want to select
only siblings whose first preceding header sibling is the matched
header.
Or in XPath:
 select="following-sibling::*[
   generate-id(preceding-sibling::x:header[1])=
   generate-id(current())]"
There are several other possiblities to express this, some of
which may have a better performance.

J.Pietschmann

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