Forward and Backward Compatibility

Forward Compatibility

Forward compatibility verifies that current software works correctly with future versions of hardware, software, or file formats that don't exist yet at the time of testing.

Backward Compatibility

Backward compatibility verifies that current software continues to work correctly with older versions of hardware, software, or data formats.

Why Both Matter

• Forward compatibility protects an application's longevity as the surrounding ecosystem evolves.
• Backward compatibility protects existing users who haven't yet upgraded their systems or data.
• Both are important considerations when designing file formats, APIs, and protocols.