XML::Validate::Xerces(3pm) on Linux
The text 803311a50db2, as Debian 7 (Wheezy), Debian 6.0 (Squeeze) shipped it.
Interface to Xerces validator
The text 803311a50db2, as Debian 7 (Wheezy), Debian 6.0 (Squeeze) shipped it.
Interface to Xerces validator