You can find the Scott Ambler description of the changes here:
In particular, we simplified the wording of the three principles (reduce technical debt, visualize workflow, multi-modal organizations) that we added to extend the original Manifesto for Agile Software Development. – Scott W. Ambler
and the updated manifesto here:
- EN: http://www.disciplinedagiledelivery.com/disciplinedagilemanifesto/
- RO: http://www.disciplinedagiledelivery.com/disciplinedagilemanifesto/romanian/
AGILE & LEAN 