[xsl] Sorting a TEI <biblStruct> bibliography by <surname>

Friends,

Using TEI-P5 <biblStruct> format, I'm trying to sort a bibliography by 
surname. Some sample entries are like this (such that <surname> falls 
under varying paths):
<biblStruct 
xml:id="Buswell-1989"><monogr><author><surname>Buswell</surname><forename>Robert 
E., Jr.</forename></author><title level="m">The Formation of Ch'an 
Ideology in China and 
Korea</title><imprint><pubPlace>Princeton</pubPlace><publisher>Princeton 
UP</publisher><date>1989</date></imprint></monogr></biblStruct>
<biblStruct xml:id="Chan-1967a"><monogr><editor 
role="editor"><surname>Chan</surname><forename>Wing-tsit</forename></editor><title 
level="m">Neo-Confucian Terms Explained</title><imprint><pubPlace>New 
York</pubPlace><publisher>Columbia University 
Press</publisher><date>1986</date></imprint></monogr></biblStruct>
<biblStruct 
xml:id="Chien-1988"><analytic><author><surname>Ch'ien</surname><forename>Edward 
T.</forename></author><title level="a">The Neo-Confucian Confrontation 
with Buddhism: A Structural And Historical 
Analysis</title></analytic><monogr><title level="j">Journal of Chinese 
Philosophy</title><imprint><biblScope 
type="vol">15</biblScope><date>1988</date><biblScope 
type="pages">347–348</biblScope></imprint></monogr></biblStruct>

My code for handling <biblStruct> has been working fine for a number of 
years, but I just recently tried to add the sort by <surname>. The 
relevant part of the code looks like this (including my most recent 
attempt at sorting, which generates error messages):

 <!-- Bibliographical renderings -->
<xsl:template match="TEI//listBibl">
 <xsl:for-each select="biblStruct">
   <xsl:sort select="*//surname"/>
  <p style="text-indent:-10mm;margin-left:10mm">
   <xsl:if test="@n">
    <span style="font-weight:bold;margin-left:2mm">
     <xsl:value-of select="@n"/>
     <xsl:text>-&#x09;</xsl:text>
    </span>
   </xsl:if>
     <xsl:apply-templates/>
  </p>
 </xsl:for-each>
</xsl:template>


Any advice would be greatly appreciated. Once I get this working, I'd 
also like to do a second sort, based on the <title>. This is to get 
output in Chicago Full Note style.
Regards,

Chuck




--

---------------------------
A. Charles Muller

Graduate School of Humanities and Sociology
Faculty of Letters
University of Tokyo
7-3-1 Hongō, Bunkyō-ku
Tokyo 113-8654, Japan

Office Phone: 03-5841-3735

Web Site: Resources for East Asian Language and Thought
http://www.acmuller.net

Twitter: @H_Buddhism
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