How to include the name of a xml document in the conte

	Hello everyone,
I am using a xsl document to do several transformations in xml files. 
I would like to include in the xml document the name of the file like the
content of a tag.

E.g.: 

Original XML (before XSL Transformation):

<?xml version="1.0" encoding="ISO8859-1" ?>
<CATALOG>
  <CD>
    <TITLE>Empire Burlesque</TITLE>
    <ARTIST>Bob Dylan</ARTIST>
    <COUNTRY>USA</COUNTRY>
    <COMPANY>Columbia</COMPANY>
    <PRICE>10.90</PRICE>
    <YEAR>1985</YEAR>
  </CD>
.
.
.

Final XML (after XSL Transformation):

<?xml version="1.0" encoding="ISO8859-1" ?>
<CATALOG>
  <CD>
    <DOC>The_name_of_the_xml_document</DOC>
    <TITLE>Empire Burlesque</TITLE>
    <ARTIST>Bob Dylan</ARTIST>
    <COUNTRY>USA</COUNTRY>
    <COMPANY>Columbia</COMPANY>
    <PRICE>10.90</PRICE>
    <YEAR>1985</YEAR>
  </CD>
.
.
.

Is there any easy way to get the name of the xml document using a xsl file?

Thank you.

	Beatriz 

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