versioning-standards

Semantic versioning comparison across ecosystems requires mapping rules that translate differing metadata and pre-release formats into a normalized structure. This enables accurate version evaluation and prevents incorrect upgrades when comparing Debian, RPM, or Maven packages.

SemVer uses major.minor.patch numbers for API stability, CalVer uses calendar dates for release tracking, and PEP 440 handles Python-specific pre-release and epoch rules. Each scheme has distinct parsing and comparison logic for its ecosystem.

Dependency range operators like ^, ~, and ~= define acceptable version bounds. Caret allows updates that do not modify the left-most non-zero digit, tilde restricts patch-level updates, and ~= provides compatible release bounds based on specific ecosystem rules.

You bump the major version for incompatible API changes, the minor version for backward-compatible new features, and the patch version for backward-compatible bug fixes. A decision framework evaluates the change impact to determine the correct bump type.

Yes, PEP 440 supports epoch numbering to override standard version ordering and post-release segments to indicate updates following a release. Explicit handling of these fields is required for accurate parsing and comparison within the Python ecosystem.

Version comparison differs between Debian and SemVer because Debian uses a specific precedence rule for revision and epoch fields, while SemVer relies on strict major.minor.patch ordering. Cross-ecosystem mapping translates these distinct rules for accurate evaluation.