Generally not, since an XML parse, by definition, parses XML and plain
text is not XML.  What I've done in such situations is to write a parser
for the source language (whatever kind of language is in the text file)
using tools like lex and yacc (and the Java equivalents) and write
simple production rules to generate meaningful XML.  From there, you can
use XSLT to further process the file contents, and *that* is where an
XML parser can be useful.

Ed

Wrong tool.  You might want to have a look at
http://servingxml.sourceforge.net/.

Regards,
Daniel Parker