Evolution

  • DocBook is stable.

  • Backwards incompatible changes can only occur at full version revisions (5.0, 6.0, etc.).

  • Minor revisions (3.1, 4.1, 4.1.2) are always backwards compatible.

  • Backwards incompatible changes have to be announced a full version before they are implemented.

  • Except for the V5.0 release.