Tracing a transformation

["ROSSEL Olivier (CIMPA)" <ol...@airbus.com>]

I have made a small transformation: 
XML: 
<a value="valueA"><b>valueB=1</b><b>valueB=2</b></a> 

XSL: 
<xsl:template match="/"> 
 <html> 
  <xsl:apply-templates/> 
 </html> 
</xsl:template> 

<xsl:template match="a"> 
 <p/> 
</xsl:template> 



But when I use Trace.java to trace 
what happens during transformation, I get 
a rather strange log: 
---begin here--- 
file:/C:/eclipse/workspace/xalan/samples/Trace/foo.xsl Line #6, Column #-1:
template match='/' 
STARTDOCUMENT 
file:/C:/eclipse/workspace/xalan/samples/Trace/foo.xsl Line #7, Column #-1:
html 
file:/C:/eclipse/workspace/xalan/samples/Trace/foo.xsl Line #8, Column #-1:
apply-templates 
Selected source node '#document', at file 'null', line #-1, column #-1 
file:/C:/eclipse/workspace/xalan/samples/Trace/foo.xsl Line #8, Column #-1:
apply-templates, select='null': 
     10001: a 
file:/C:/eclipse/workspace/xalan/samples/Trace/foo.xsl Line #12, Column #-1:
template match='a' 
STARTELEMENT: html 
file:/C:/eclipse/workspace/xalan/samples/Trace/foo.xsl Line #13, Column #-1:
p 
STARTELEMENT: p 
ENDELEMENT: p 
ENDELEMENT: html 
ENDDOCUMENT 
---end here--- 

Several things happen between the first encounter of the "html" tag 
in the XSL and the effective creation of the tag "html" in the result
document. 
It seems that Xalan is already resolving the "a" template before it
generates 
the opening "html" tag. 

My real-life problem with that is that if I wait for the "html" genration
event, 
I am no longer able to find which template provoked that (because the
template 
has changed in-between). 

Is it a dumb question? Can anyone explain me how to solve it?