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(_at_)gmail(_dot_)com>
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, I’m 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 generals…</p>
<h2>J. R. Hacker’s implementation</h2>
<p>And here are the particulars…</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 generals…</p>
<section>
<header>
<h2>J. R. Hacker’s implementation</h2>
</header>
<p>And here are the particulars…</p>
</section>
</article>
</body>
</html>
Or, algorithmically speaking:
• enclose the <body /> contents into an <article /> element, if
there’s none;
• enclose uninterrupted sequences of two or more heading (<h1 />
to <h6 />) elements into <hgroup />s;
• enclose the resulting <hgroup />s and the (so far unprocessed)
singular heading elements into <header />s;
• 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 />’s <header /> is to be excluded.
My current implementation is at [1], and what makes me wonder is
whether it’s 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
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