v2v3

V2v3 is a shorthand used in software development, systems engineering, and protocol design to refer to the relationship, transition, or compatibility between version 2 and version 3 of a product, standard, or interface. It is not a formal standard itself; rather, it appears in documentation, release notes, and configuration to discuss how the two versions relate and what changes are involved in moving from one to the other.

In software versioning, v2v3 commonly describes upgrade paths, migration needs, and compatibility requirements when moving from version 2 to version 3. Projects may outline breaking changes, deprecated features, and new APIs that require changes in client applications, data models, and deployment pipelines. Migration tooling, data migrations, and testing strategies are often organized around a v2v3 transition to minimize disruption.

In protocols and APIs, v2v3 can denote version negotiation or support matrices where clients and servers declare supported versions. A typical pattern is that both sides advertise v2 and v3, and the highest common version is selected for use. This approach helps maintain backward compatibility while enabling access to newer capabilities.

Practical considerations for v2v3 work include documenting the upgrade path, providing migration scripts, updating client libraries, and maintaining test coverage for both versions where feasible. Teams also plan deprecation timelines for v2 features and communicate compatibility guarantees to users and integrators.

See also: versioning, API versioning, backward compatibility, migration.