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Subject: DOCBOOK-APPS: Overriding <para> template creates invalid HTML
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I seem to have stumbled upon an odd bug. I wanted to override the
default <para> match rule, but in certain contexts, I get invalid HTML
(extra '</p>' end tags). I then pared it down to the simplest test
case, and it turns out that even copying the *identical* para match
rule from "block.xsl" into a customization layer causes the problem.
Somehow the "unwrap.p" named-template gets defeated, causing invalid
HTML.
This has been filed as bug #583335 at sourceforge:
https://sourceforge.net/tracker/index.php?func=detail&aid=583335&group_id=21935&atid=373747
Here is the test case, "test.xml":
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
"http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd";>
<article condition="main">
<title>test</title>
<itemizedlist>
<listitem>
<formalpara>
<title>title</title>
<para>Some problem</para>
</formalpara>
</listitem>
</itemizedlist>
</article>
Here is the customization layer, "test.xsl" (note this simply a
cut-n-paste of the template from block.xsl):
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
version='1.0'>
<xsl:import
href="http://docbook.sourceforge.net/release/xsl/1.52.2/html/docbook.xsl"/>
<xsl:output method="html" encoding="ISO-8859-1"
doctype-public="-//W3C//DTD HTML 4.01 Transitional//EN"
doctype-system="http://www.w3.org/TR/html4/loose.dtd"; indent="no"/>
<xsl:template match="para">
<xsl:variable name="p">
<p>
<xsl:if test="position() = 1 and parent::listitem">
<xsl:call-template name="anchor">
<xsl:with-param name="node" select="parent::listitem"/>
</xsl:call-template>
</xsl:if>
<xsl:call-template name="anchor"/>
<xsl:apply-templates/>
</p>
</xsl:variable>
<xsl:choose>
<xsl:when test="$html.cleanup != 0">
<xsl:call-template name="unwrap.p">
<xsl:with-param name="p" select="$p"/>
</xsl:call-template>
</xsl:when>
<xsl:otherwise>
<xsl:copy-of select="$p"/>
</xsl:otherwise>
</xsl:choose>
</xsl:template>
</xsl:stylesheet>
and here is the output (this fails a validation check at
validator.w3.org):
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd";><html><head><meta
content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type"><title>test</title><meta name="generator" content="DocBook XSL Stylesheets V1.52.2"></head><body bgcolor="white"
text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div
class="article"><div class="titlepage"><div><h2 class="title"><a
name="id2775507"></a>test</h2></div><hr></div><div
class="itemizedlist"><ul type="disc"><li><p><b>title. </b><p>Some
problem</p></p></li></ul></div></div></body></html>
With the following message:
Below are the results of attempting to parse this document with an
SGML parser.
* Line 2, column 50:
... "disc"><li><p><b>title. </b><p>Some problem</p></p></li></ul></div></ ...
^
Error: end tag for element "P" which is not open; try removing
the end tag or check for improper nesting of elements
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