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Change-history events separately record accepted before-and-after publication changes.","change_history":"Events record accepted publication changes, not every evidence re-check or a claim that the product changed on that date.","change_validity":"valid_from and valid_to remain null unless a source establishes when the changed fact applied in the world.","change_scope":"Compatibility, system pairing, suitability and relative leaderboard prose are excluded.","applicability":"Market evidence does not establish stock, system compatibility, network approval, installation suitability, or approval of an earlier installation.","approval_history":"Approval history contains exact, score-neutral source-register links recorded since monitoring began. It is not a complete lifetime history."}}