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[ci skip] Document Rails' shifted semver.

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JuanitoFatas authored and zzak committed May 30, 2014
1 parent b9c8dec commit 14facb1ae0bc37f9ec3a29d21cf7997b6dae6408
Showing with 23 additions and 4 deletions.
  1. +23 −4 guides/source/
@@ -3,10 +3,29 @@ Maintenance Policy for Ruby on Rails
Support of the Rails framework is divided into four groups: New features, bug
fixes, security issues, and severe security issues. They are handled as
-follows, all versions in x.y.z format
+follows, all versions in `X.Y.Z` format.
+Rails follows a shifted version of [semver](
+**Patch `Z`**
+Only bug fixes, no API changes, no new features.
+Except as necessary for security fixes or deprecations.
+**Minor `Y`**
+New features, may contain API changes (Serve as major versions of Semver).
+Breaking changes are paired with deprecation notices in patch level release of
+the last minor version level.
+**Major `X`**
+New features, will likely contain API changes. The difference between Rails'
+minor and major releases is the magnitude of breaking changes, and usually
+reserved for special occasions.
New Features
@@ -20,7 +39,7 @@ Only the latest release series will receive bug fixes. When enough bugs are
fixed and its deemed worthy to release a new gem, this is the branch it happens
-**Currently included series:** 4.0.z
+**Currently included series:** `4.0.Z`
Security Issues
@@ -35,7 +54,7 @@ be built from 1.2.2, and then added to the end of 1-2-stable. This means that
security releases are easy to upgrade to if you're running the latest version
of Rails.
-**Currently included series:** 4.0.z, 3.2.z
+**Currently included series:** `4.0.Z`, `3.2.Z`
Severe Security Issues
@@ -44,7 +63,7 @@ For severe security issues we will provide new versions as above, and also the
last major release series will receive patches and new versions. The
classification of the security issue is judged by the core team.
-**Currently included series:** 4.0.z, 3.2.z
+**Currently included series:** `4.0.Z`, `3.2.Z`
Unsupported Release Series

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