# Interface Stability Classification

The programming interfaces and data structures are classified with a stability class. These classifications help developers understand which interfaces may change in future releases and may need to be wrapped within their applications.

The version numbering for Embedthis products follows the scheme MAJOR.MINOR.PATCH. For example 2.1.3 is major version 2, minor version 1 and patch version 3.

Classification | Description
--- | ---
Mature | Must be interoperable across at least two consecutive major releases so that applications are not required to change. These APIs must be Deprecated before change or removal.
Stable | Will not change between minor releases (e.g. 2.0 to 2.1). May change between major releases.
Evolving | May change between major or minor releases. May not change between patch releases (e.g. 2.0.0 to 2.0.1) release.
Prototype | May change between any major, minor or patch releases.
Deprecated | For use by legacy applications only. Customers are advised that these interfaces may be removed in the next major or minor release.

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