Programs provided with this copy called XML-Edifact-0.32.tgz can be used, distributed and modified under terms of the GNU General Public License.
Files in the ./examples directory are from varios sources and free of claims as far as I know.
Files inside the ./un_edifact_d96b directory are based on EDI batch directory and are therefore copyrighted by the United Nations. See un_edifact_d96b/LICENAGR.TXT.
Files that are produced during the bootstrap process and placed in ./data are based on the original UN/EDIFACT standard and therefore not covered by GPL, but likely be covered by the UN.
Besides the GPLed Edition a Custom Edition, exist if you dislike GPL. Drop me an eMail and ask for price and conditions. You can also hire me as a consultant within Europe, if you think that the author of a tool will probately the best one for teaching your programmers.