XSLT, 2nd Edition

Mix XSLT 1.0 and XSLT 2.0 in the Same Stylesheet

A very useful technique for XSLT 2.0 migration is to process parts of the stylesheet in XSLT 1.0 or XSLT 2.0 mode. The simplest way to do this is to create an stylesheet with version="2.0", adding version="1.0" to templates as needed. (Remember, the version attribute can be used on any XSLT element except <xsl:output>.) This lets you migrate your stylesheet in stages without worrying about dynamic errors. If your stylesheet depends on math being processed using XSLT 1.0 rules, you can set that section of the stylesheet to use version="1.0". As your XSLT 2.0 experience grows, you can address the XSLT 1.0 sections of the stylesheet and migrate them to XSLT 2.0.