Set HTML5 doctype with XSLT

How would I cleanly set the doctype of a file to HTML5 <!DOCTYPE html> via XSLT (in this case with collective.xdv)

The following, which is the best my Google foo has been able to find:

<xsl:output
    method="html"
    doctype-public="XSLT-compat"
    omit-xml-declaration="yes"
    encoding="UTF-8"
    indent="yes" />

produces:

<!DOCTYPE html PUBLIC "XSLT-compat" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

Solution 1:

I think this is currently only supported by writing the doctype out as text:

<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:output method="html" encoding="utf-8" indent="yes" />

  <xsl:template match="/">
    <xsl:text disable-output-escaping='yes'>&lt;!DOCTYPE html&gt;</xsl:text>
    <html>
    </html>
  </xsl:template>

</xsl:stylesheet>

This will produce the following output:

<!DOCTYPE html>
<html>
</html>

Solution 2:

To use the simple HTML doctype <!DOCTYPE html>, you have to use the disable-output-escaping feature: <xsl:text disable-output-escaping="yes"><!DOCTYPE html></xsl:text>. However, disable-output-escaping is an optional feature in XSLT, so your XSLT engine or serialization pipeline might not support it.

For this reason, HTML5 provides an alternative doctype for compatibility with HTML5-unaware XSLT versions (i.e. all the currently existing versions of XSLT) and other systems that have the same problem. The alternative doctype is <!DOCTYPE html SYSTEM "about:legacy-compat">. To output this doctype, use the attribute doctype-system="about:legacy-compat" on the xsl:output element without using a doctype-public attribute at all.

<?xml version="1.0"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
   <xsl:output method="html" doctype-system="about:legacy-compat"/>
   ...
   <html>
   </html>
</xsl:stylesheet>

Solution 3:

<xsl:output
     method="html"
     doctype-system="about:legacy-compat"
     encoding="UTF-8"
     indent="yes" />

this outputs

<!DOCTYPE html SYSTEM "about:legacy-compat">

this is modified as my fix to http://ukchill.com/technology/generating-html5-using-xslt/

Solution 4:

With Saxon 9.4 you can use:

<xsl:output method="html" version="5.0" encoding="UTF-8" indent="yes" />

This generates:

<!DOCTYPE HTML>

Set HTML5 doctype with XSLT

Solution 1:

Solution 2:

Solution 3:

Solution 4:

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