Definitions

Major (breaking) release (upgrade) is announced to XTRF customers community several months in advance and contains brand new features and major functional improvements, as well as removal of discontinued features.

Major release is addressed at first position of the version numbering scheme: x.y.z. e.g. 6.0.0, 7.0.0.

Minor (feature) release (update) contains minor functional improvements and bug fixes.  No feature can be removed at this occasion, but some features can be announced as deprecated. If the release includes any changes to API or customizations, they are guaranteed to be backward-compatible.
Minor release is addressed at the second position of the version numbering scheme: x.y.z. e.g. 7.2.0, 8.2.0.

Patch (fix) release (update) contains bug fixes only.
Patch release is addressed at the third position of the version numbering scheme: x.y.z. e.g. 7.0.12, 7.2.1.