Upgrading Zen

Understanding version numbers

When looking at Zen version numbers, like 6.x-2.0, 7.x-5.4, or 7.x-6.0, each version number can be broken into 3 parts:

CORE.x-MAJOR.MINOR

The first part of each Zen version number shows what version of Drupal core that it is compatible with. Zen 7.x-* versions work with Drupal 7, etc.

The second and third parts of each Zen version number represents the major and minor version numbers.

Versions of Zen with the same core and major numbers, but with a differing minor number, will have nearly identical code. Updating from one to another is considered a minor upgrade.

Versions of Zen with different core or major numbers will have significant differences between the two and updating from one to another is considered a major upgrade.