Significant milestones in the development and adoption of DITA include:

Feb 2006
OASIS Launches DITA XML.org Focus Area

June 2005
DITA v1.0 Is Approved As OASIS Standard
This status signifies the highest level of ratification within the international standards consortium.

April 2004
OASIS DITA Technical Committee Forms to Advance XML Standard for Authoring Reusable Content in Documents
The group brings together XML tools vendors, consultants on Information Architectures and Content Management Systems (CMS), and users of the DITA Document Type Definitions (DTD) and Schemas.