Print warning message when an unhandled tag is encountered

diff --git a/xsl/fo/docbook.xsl b/xsl/fo/docbook.xsl
index a4355f8ba08d8272104bc87a97d614453034dfeb..78431a2d46944815952b7a22e4db21496cb63bd0 100644 (file)
--- a/xsl/fo/docbook.xsl
+++ b/xsl/fo/docbook.xsl
@@ -65,6 +65,10 @@
 <!-- ==================================================================== -->
 
 <xsl:template match="*">
+  <xsl:message>
+    <xsl:value-of select="name(.)"/>
+    <xsl:text> encountered, but no template matches.</xsl:text>
+  </xsl:message>
   <fo:block color="red">
     <xsl:text>&lt;</xsl:text>
     <xsl:value-of select="name(.)"/>