once you have changed your source to use elements not attributes, change
the  stylesheet from

<xsl:value-of select="@dsc"/>

to

<xsl:apply-templates select="@dsc"/>

Then any contained elements (such as xref) will get processed by the
normal docbook templates.

Cheers,
Wendell

======================================================================
Wendell Piez                            mailto:wapiez@xxxxxxxxxxxxxxxx
Mulberry Technologies, Inc.                http://www.mulberrytech.com
17 West Jefferson Street                    Direct Phone: 301/315-9635
Suite 207                                          Phone: 301/315-9631
Rockville, MD  20850                                 Fax: 301/315-8285
----------------------------------------------------------------------
  Mulberry Technologies: A Consultancy Specializing in SGML and XML
======================================================================