DDEX is a standard for data exchange in the music industry (http://www.ddex.net/)
It's a fairly complex XML standard or set of standards which involve creating hierarchical XML.
Are there any (opensource) tools to assist with doing this? Our data is already in a database, so some sort of ETL or reporting solution to create the file maybe?
We currently use Pentaho / Kettle / PDI - But i'm not sure this is necessarily the right tool in this case.