Requirement GV.03 - Backwards Compatibility

[absoludity]

Impacted sections

• https://uncefact.github.io/spec-untp/docs/about/Requirements#governance-requirements

Issue Description

The current text states that:

New versions of UNTP SHOULD be backwards compatible with earlier versions and each version MUST remain active and supported for a minimum of 2 years - so that implementers can have confidence in the durability of their investment.

which sounds like an over-promise hidden behind a "SHOULD". Assuming that UNTP will follow semantic versioning, I think it should promise a little less but as a MUST (even if it makes the sentence more complex).

Something like: New minor versions of UNTP MUST be backwards compatible with earlier versions. Each major version MUST remain active and supported for a minimum of 2 years - so that implementers can have confidence in the durability of their investment.

Just food for thought. Happy to push a PR if people agree.

Interestingly, the governance page does mention major/minor versions - it's just here on the requirements page that it over-promises a bit (IMO) by not mentioning major/minor versions.