Add support for <?xsl-output default="path"?> as a way to provide a default output filename to use the XSLT stylesheet. You put this in the XML document along side the <?xml-stylesheet ...?> instruction. The path can include a folder and the file extension will be overridden by the <xsl:output method="..."> information from the stylesheet, so can specify "*" as the file extension, for example: <?xsl-output default="hamlet.*"?>