UBL 2.0 Standard (December 2006)

A library of over a thousand XML components together with 31 business document schemas.

http://docs.oasis-open.org/ubl/os-UBL-2.0/

http://docs.oasis-open.org/ubl/os-UBL-2.0.zip

UBL 1.0 Standard (November 2004)

A library of over 600 XML components together with eight business document schemas and a wealth of support files.

http://docs.oasis-open.org/ubl/cd-UBL-1.0/

http://docs.oasis-open.org/ubl/cd-UBL-1.0.zip

UBL 1.0 Legacy materials

Links to the UBL 1.0 Naming and Design Rules, International Data Dictionary, Small Business Subset, and UBL Formatters can be found on the Legacy Support page:

http://www.oasis-open.org/committees/download.php/22571/legacy.htm