Given the sample xml, I think this will do what you want:

<xsl:template match="/masterdoc"> 
  <xsl:variable name="thisns"> 
    <xsl:if test="$ns"> 
      <xsl:value-of select="concat($ns,'.')"/> 
    </xsl:if> 
  </xsl:variable> 
  <xsl:for-each select="class[starts-with(@namespace,$ns)]"> 
    <xsl:variable name="nsafter"
select="substring-before(concat(substring-after(@namespace,$thisns),'.'),'.'
)"/> 
    <xsl:if
test="not(preceding-sibling::class[starts-with(@namespace,concat($thisns,$ns
after))])"> 
      <xsl:value-of select="$nsafter"/> 
    </xsl:if> 
    <xsl:text> 
    </xsl:text> 
  </xsl:for-each> 
</xsl:template> 

HTH,
David.
--
David McNally            Moody's Investors Service
Software Engineer        99 Church St, NY NY 10007 
David.McNally@[...].com            (212) 553-7475 

>  -----Original Message-----
>  From: Scott Bronson [mailto:bronson@[...].com]
>  Sent: Monday, October 14, 2002 5:36 AM
>  To: xsl-list@[...].com
>  Subject: [xsl] Hierearchy navigation in XSL
>  
>  
>  Hello.  I've solved most of this problem, but the last tiny bit has me
>  stumped.  I'm hoping someone can tell me how to fix this.
>  
>  Here's some input:
>  
>  
>  <masterdoc>
>    <class name="Object"       namespace="System"/>
>    <class name="Array"        namespace="System"/>
>    <class name="ArrayList"    namespace="System.Collections"/>
>    <class name="Comparer"     namespace="System.Collections"/>
>    <class name="Grimey"       namespace="System.Collections.Overkill"/>
>    <class name="Formatter"    
>  namespace="System.Runtime.Serialization"/>
>    <class name="ObjectHandle" namespace="System.Runtime.Remoting"/>
>    <class name="Garbage"      namespace="Other.SubAPI"/>
>  </masterdoc>
>  
>  
>  My script accepts a parameter that tells where it is in the 
>  hierarchy. 
>  It then outputs all immediate child nodes at that level in the
>  hierarchy.
>  
>  Some examples: if we're at "System", the script should output
>  "Collections" and "Runtime".  If we're at "System.Collections", it
>  should output "Overkill".  If we're at "", it should output 
>  "System" and
>  "Other".  If at "Other", output "SubAPI".  Seems a fairly 
>  easy problem,
>  right?
>  
>  
>  
>  Here's my script right now:
>  
>  
>  <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
>  version="1.0">
>  <xsl:output method="text"/>
>  <xsl:param name="ns"/>
>  <xsl:key name='uniq' match='class' use='@namespace'/>
>  
>  <xsl:template match="/masterdoc">
>    <xsl:for-each
>  select="class[generate-id()=generate-id(key('uniq',@namespace)[1])]">
>      <xsl:sort select="@namespace"/>
>      <xsl:choose>
>        <xsl:when test="string-length($ns)=0">
>          <xsl:value-of select="@namespace"/>
>        </xsl:when>
>        <xsl:when test="starts-with(@namespace,concat($ns,'.'))">
>          <xsl:value-of
>  select="substring(@namespace,string-length($ns)+2)"/>
>        </xsl:when>
>      </xsl:choose>
>  <xsl:text>
>  </xsl:text>
>    </xsl:for-each>
>  </xsl:template>
>  
>  </xsl:stylesheet>
>  
>  
>  
>  Here are some example runs of this script:
>  
>  xalan -Q -XSL samp1.xsl -IN sample.xml -PARAM ns 
>  "'System.Collections'"
>  Overkill
>  
>  xalan -Q -XSL samp1.xsl -IN sample.xml -PARAM ns "'System'"
>  Collections
>  Collections.Overkill
>  Runtime.Remoting
>  Runtime.Serialization
>  
>  
>  The last one illustrates the problem.  It should have output only
>  "Collections" and "Runtime".
>  
>  I picture the algorithm being something like:
>     if(not(already copied string-before("Runtime.Remoting", "."))
>        then copy string-before("Runtime.Remoting", ".") to output
>  
>  I've tried various combinations of preceding, preceding sibling, and
>  position to try to figure out what I've already output.  I even tried
>  key() and using IDs to navigate the parent.  All has resulted in
>  frustration.
>  
>  Does anyone have any idea of what I can do?  I'm out of ideas.
>  
>  Thank you!
>  
>      - Scott
>  
>  
>  
>  
>  
>   XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list
>  


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