This was renamed to Semantic Versioning Tilde.
An extension of Semantic Versioning for initial developments.
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Semantic Versioning Caret (SemVer^) conforms to Semantic Versioning 2.0.0 except for the following clauses.
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If X (major version) is 0, versioning is initial-development-mode.
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In initial-development-mode, a normal version number MUST take the form 0.X′.Y′ where X′, Y′ are non-negative integers, and MUST NOT contain leading zeroes. X′ is the initial-major version, and Y′ is the initial-minor version.
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Initial-minor version Y′ MUST be incremented if newly backwards compatible functionality is introduced to the public API and/or backwards compatible bug fixes are introduced.
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Initial-major version X′ MUST be incremented if any backwards incompatible changes are introduced to the public API. It MAY include initial-minor level changes. Initial-minor version MUST be reset to 0 when initial-major version is incremented.
Creative Commons Attribution 3.0 Unported License
And Semantic Version Caret derives Semantic Versioning 2.0.0, licensed by Tom Preston-Werner under Creative Commons Attribution 3.0 Unported License.