Hi,
In XSLT processing, more than one xsl:output element is allowed in a
stylesheet and its imports. The spec says that the attributes in all the
xsl:output elements are combined using import precedence into a single
conceptual xsl:output. Although your xsl:output does not specify
doctype-public or doctype-system attributes, those attributes are in the
xsl:output element in the xhtml/docbook.xsl file that your customization
imports. So that is where the DOCTYPE is coming from.
To turn them off, you might think that in your customization layer you could
add those two attributes and set their values to blank:
<xsl:output
indent="yes"
encoding="utf-8"
doctype-public=""
doctype-system=""/>
That does not work. You get:
<!DOCTYPE html PUBLIC "" "">
Ugh. This is true with Saxon as well. I had a discussion with Michael Kay
about this very problem, and it seems that once those attributes are set,
they can't be completely unset if you want no DOCTYPE generated at all.
One solution is to edit the original xhtml/docbook.xsl file that your file
imports to remove those attributes from its xsl:output element. I hate
having to edit the distro files, though, and sometimes you can't. This
should be possible with a customization layer.
Fortunately, there is a way. If you import the xhtml/onechunk.xsl
stylesheet instead of xhtml/docbook.xsl, you get one output file, and you
have more control over the DOCTYPE. The onechunk.xsl stylesheet uses the
exsl:document() function to write the output instead of using the standard
output of the xslt processor. The stylesheet controls which parameters are
passed to that function. If the chunking parameters for specifying the
doctypes are set to blank, then those parameters are not passed at all, and
so no DOCTYPE is created. The customization looks something like this;
<xsl:import href="[path-to]/docbook-xsl-ns-1.74.0/xhtml/docbook.xsl"/>
<xsl:param name="chunker.output.doctype-public" select="''"/>
<xsl:param name="chunker.output.doctype-system" select="''"/>
<xsl:param name="chunker.output.encoding" select="'utf-8'"/>
<xsl:param name="chunker.output.indent" select="'yes'"/>
This will result in a single output file with no DOCTYPE.
There is one other change you need to make. The default output filename for
a chunked book is "index" plus the extension. You can change that on the
command line by setting the stylesheet parameter "root.filename" to the
output filename you expect for the given document. Basically it replaces
xsltproc's -o option, but minus the filename extension.
Bob Stayton
Sagehill Enterprises
[EMAIL PROTECTED]
----- Original Message -----
From: "Matej Cepl" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Friday, July 11, 2008 2:57 PM
Subject: [docbook-apps] Remove DOCTYPE from XML document generated from
Docbook?
Hi,
trying to produce ATOM feed from a Docbook (customized) only with
XSLT. The problem is that even though my <xsl:output> looks like
(the complete XSL stylesheet is at
http://mcepl.fedorapeople.org/tmp/atom.xsl):
<xsl:output
indent="yes"
encoding="utf-8"/>
xsltproc still generates HTML DOCTYPE and xmlns:
<?xml version="1.0" encoding="utf-8" standalone="yes"?>
<!DOCTYPE atom:feed PUBLIC "-//W3C//DTD XHTML 1.0
Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd";>
<atom:feed xmlns:atom="http://purl.org/atom/ns#";
xmlns:date="http://exslt.org/dates-and-times";
xmlns:dc="http://purl.org/dc/elements/1.1/"; xml:lang="en"
lang="en">
How to avoid elimination of doctype-public and doctype-system as
they are apparently imported from the xhtml/docbook.xsl? (of
course, I know that there is no public DOCTYPE for atom).
Best,
Matěj Cepl
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