hasVersion

hasVersion is a boolean predicate used in software systems to determine whether a particular version identifier exists for a given artifact, package, or item within a catalog or repository. It is commonly exposed as a function, method, or check in APIs, libraries, configuration languages, or build tools. The function takes a version string as input and returns true if that version is stored or published, and false if not.

Common contexts include package managers (for example, package registries), build systems, artifact repositories, content management systems with versioned assets, and APIs that expose versioned resources. Versions can follow semantic versioning or other schemes; the exact format depends on the system. hasVersion typically performs an exact-match check, but some implementations may support version ranges, qualifiers, or pre-release labels.

Implementation considerations include how versions are stored (as a set, list, or indexed data structure), how to handle aliases, and how to deal with performance at scale. It may be paired with other operators, such as getVersion or listVersions, to enable fuller version management. In many environments, hasVersion is used during dependency resolution to verify that a required version exists before attempting to fetch or install it.

For example, given a catalog containing 1.0.0, 1.1.0, and 2.0.0, hasVersion('2.0.0') returns true, while hasVersion('2.0.1') returns false.

See also semantic versioning, dependency management, version control, artifact repositories.