Stylesheet has no templates

A stylesheet or package that declares nothing at all contributes nothing to a transformation: it produces no output and exports nothing to an importer. Usually it is a file somebody started and never wrote. Fill it, or, if it is a customisation hook another stylesheet imports, say so in a comment.

Any top-level XSLT element counts as a declaration, so a module holding only an xsl:output, an xsl:import, or a key is left alone.

Incorrect:

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"/>

Correct:

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:output method="html"/>
  <xsl:template match="/">
    <p><xsl:value-of select="."/></p>
  </xsl:template>
</xsl:stylesheet>