This page contains links to the various OMG Unified Modeling Language revisions, starting with UML v. 1.1, which was adopted by the OMG in November 1997.

UML 2.0 Specifications

• OMG UML 2.1.2 Superstructure Specification - (OMG doc# formal/07-11-02). Yet another"dot" release that consists mostly of corrections to errata.
• OMG UML 2.1.1 Superstructure Specification - (OMG doc# formal/07-02-05). A "dot" release that consists mostly of corrections to errata.
• OMG UML 2.1 Superstructure Specification - (OMG doc# ptc/06-04-02). Minor revision to UML 2.0.
• OMG UML 2.0 Superstructure Specification - (OMG doc# formal/05-07-04). Major revision that defines a major new diagram type (Composite Structures), includes many enhancements to Activity and Sequence diagrams, and fully integrates Action Semantics with UML.
• Unified Modeling Language: Superstructure v. 2.0 - (OMG doc# ad/03-01-01). Major revision to UML 1.x proposed by the U2 Partners language design team on 10 April 2003, subsequently adopted by the OMG.

UML 1.x Specifications

• OMG UML Specification v. 1.5 - (OMG doc# formal/03-03-01).
  Minor revision that includes Action Semantics for executable models.
• OMG UML Specification v. 1.4 - (OMG doc# formal/01-09-67).
  Minor revision that includes improvements to Components and Stereotypes.
• OMG UML Specification v. 1.3 - (OMG doc# formal/00-03-01).
  Minor revision that fixes various bugs with UML v. 1.1.
• OMG UML Specification v. 1.2 - (OMG doc# ad/98-12-02).
  Editorial cleanup revision, which reformatted the specification and corrected typographical errors and logical inconsistencies, but did not make significant technical revisions.
• OMG UML Specification v. 1.1 - (OMG document ad/97-08-11).
  UML Partners' final proposal to the OMG. This is the first version of UML that was adopted by the OMG.