# OpenAM Administration Guide
Release Levels & Interface Stability

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## 1. Open Identity Platform Product Release Levels

Open Identity Platform defines Major, Minor, and Maintenance product release levels. The release level is reflected in the version number. The release level tells you what sort of compatibility changes to expect.

Major (version: x[.0.0], trailing 0s are optional)

  Major releases bring big new features. Major releases can include changes even to Stable interfaces. Major releases can remove previously Deprecated functionality, and in rare cases remove Evolving functionality that has not been explicitly Deprecated. Major releases also include the changes present in previous Minor and Maintenance releases.

Minor (version: x.y[.0], trailing 0s are optional)

  Minor releases might include new features, backwards-compatible changes to Stable interfaces in the same Major release, and incompatible changes to Evolving interfaces. Minor releases can remove previously Deprecated functionality. Minor releases also include the changes present in Maintenance releases.

Maintenance (version: x.y.z)

  Maintenance releases can include bug fixes. Maintenance releases are intended to be fully compatible with previous versions from the same Minor release.