Clarify that multiple year elements are required.

diff --git a/xsl/params/make.year.ranges.xml b/xsl/params/make.year.ranges.xml
index 0c093c8944b76966e83c708146c744f13deda599..1fcb17d29fc5bc97774e829589f0c82e33c5595b 100644 (file)
--- a/xsl/params/make.year.ranges.xml
+++ b/xsl/params/make.year.ranges.xml
@@ -19,7 +19,13 @@
 
 <refsection><info><title>Description</title></info>
 
-<para>If non-zero, copyright years will be collated into ranges.</para>
+<para>If non-zero, multiple copyright year elements will be
+collated into ranges.
+This works only if each year number is put into a separate
+year element.  The copyright element permits multiple
+year elements. The stylesheet will not successfully parse
+a complex year element such as &lt;2001,2002,2003&gt; into
+a range.</para>
 
 </refsection>
 </refentry>