Versioning

Following LANL policy, the leading part of the version number relates to the approved scope of the Nautilus library, and a change in this number implies a change in the scope of Nautilus. Therefore, Nautilus uses a four-part versioning scheme, with a leading number for compliance with LANL policy, and the remaining three parts approximately follow the rules for semantic versioning.

For a Nautilus version A.B.C.D, the meaning of each part is:

• A: the scope number, which will rarely or never increase

• B: the compatibility number, which will increase when backwards compatibility is broken (compare SemVer’s “major” version number)

• C: the feature number, which will increase when new features are added without breaking compatibility (compare SemVer’s “minor” version number)

• D: the bug fix number, which will increase when fixing bugs or making other trivial changes (compare SemVer’s “patch” version number)