Well, I gave you about all that I have... I will receive an xsd file to validate my xml output. The output will be the results from some SQL query to a MySQL DB. This will be running under Apache + mod_perl (that I have configured and it's working). For now I'm just trying to figure out where to start because I will need this and I don't know how to do it. Using DBI and CGI module it's what I'm learning for now. Thanks for the replies.