Param after content

xsl:param declares a parameter of its xsl:template or xsl:function, so it must come first — before any variable, instruction, or literal result. A param that follows real content is invalid XSLT, which a processor rejects and XML well-formedness never catches, since the element is well-formed on its own. (An xsl:context-item, and other xsl:param siblings, are the only things allowed before it.)

The check is report-only: moving the param ahead of the content is a structural reorder that waits on the full-fidelity parser (#228).

Incorrect:

<xsl:template name="t">
  <xsl:variable name="v" select="1"/>
  <xsl:param name="p"/>
</xsl:template>

Correct:

<xsl:template name="t">
  <xsl:param name="p"/>
  <xsl:variable name="v" select="1"/>
</xsl:template>