VER Compatibility Matrix

Every change on the standards track classified by what it breaks, for producers and for consumers.

1. OverviewDate: 25 August 2026 (revision 3).
2. §1The four classes, and the questions each must answerEvery row below answers the same two questions:
3. §2The 1.0.1 schema deltas (3)Exactly three constraint changes, plus metadata ($id, title, description).
4. §3The 1.0.1 example edits (5)The corrected example validates under both schemas — the golden example must never be the artifact that forces a consumer upgrade.
5. §4Annex items E1–E29All twenty-nine are corrections, disambiguations, or scope statements over VER 1.0.
6. §5Editorial notes N1–N6
7. §6The 1.1 draft capabilitiesEvery row is additive 1.1 unless marked otherwise, and every row carries the same Q2 answer: a Record using this capability fails the 1.0.1 schema and MUST declare ver_version: "1.1".
8. §7Architecture decisionsRatification exposure.
9. §8Repository changes on this branchShipped alongside the standards artifacts.
10. §9Answers, stated onceDoes any 1.0.0-conformant Record become invalid under the 1.0.1 schema? No.