Significant milestones in the development and adoption of DITA include:

August 2007
DITA 1.1 is approved as OASIS Standard
This status signifies the highest level of ratification within the international standards consortium.

March 2006
OASIS Launches DITA XML.org.
The site combines the free expression of a wiki with stable background materials on the standard, as well as organized community postings on topical issues.

August 2005
DITA Open Toolkit 1.1 Is Released.
The DITA Open Toolkit publishes reference implementation support for DITA 1.0 in its DITA-OT 1.1 major release.

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

October 2002
IBM Publishes Report of Prototype DITA Project.
Susan Carpenter describes a prototype DITA project that she drives for IBM's WebSphere Application Server in an experience report, "Implementing DITA XML in a Production Environment."

May 2002
DITA Toolkit Introduces Domain Specialization.
An update of the DITA Toolkit introduces domain specialization as a major addition to the existing method of topic specialization. This release is the base on which most of DITA's 1.0 features are formalized.

March 2001
IBM Introduces DITA.
DITA is introduced as a series of developerWorks articles and a small download package of sample processing tools.