This link has never been valid: https://web.archive.org/web/20180901000000*/http://hibernate.org/dtd/hibernate-mapping-5.3.dtd

Correct link: http://hibernate.org/dtd/hibernate-mapping-3.0.dtd

The source of the link should be fixed, not our own site. If you found this link on our site, please tell us where.

Closing for now.