Comma-Separated List of Items

well, at least all you know I'm not a american, what makes me very proud....

So,  like I was saying

my problem:  I am comparing two xml files that they describe books,
the result of this comparison -  book's  list to be bought.  I wish to
know if you knowsome way to pass the ISBN of these books in lack to
another XML that goes on the  Amazon's parameters, with the purpose to
bring the price of these books using XSL.


The exemple to Amazon.com


<?xml version="1.0" encoding="UTF-8"?>
<ProductInfo xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="http://xml.amazon.com/schemas/dev-heavy.xsd">
<Details
url="http://www.amazon.com/exec/obidos/redirect?tag=webservices-20%26creative
=D2U5FEMVH12ISD%26camp=2025%26link_code=xm2%26path=ASIN/0471850683">
<Asin>0471850683</Asin>
<ProductName>Noise Reduction Techniques in Eletronic system, 2nd
Edition</ProductName>
<catalog>Book</catalog>
<isbn>80636318-6</isbn>
</Details>
</ProductInfo>



My Xmls file


<books>
  <book>
   <isbn>1235456-0</isbn>
<title>Semanthic</title>
<author>Djor Khurx</author>
</book>
</books>

Marcos Hercules