FA-54360 / Accessibility interaction semantics / Member archive

Cross-document label identifiers collide · case 05

Cross-document label identifiers collide.

Member previewVariant 5 · 3 implementations · 9 checks per implementation

Case contract

Input [controls,labels,document] controls [id,doc,labelable,wrapping_label], labels [id,doc,for_id,text,order]. Labels with for_id None apply only through wrapping_label; explicit empty for_id never wraps. For each labelable control in document, combine matching labels sorted order, ignoring other documents; repeated text retained but each label ID occurs at most once. Explicit for_id matches exact control ID and overrides wrapping. Preserve text verbatim except skip empty text. Return [control_id,label_texts]. Every control ID is unique within document, labels may repeat IDs; first eligible duplicate wins.

Why this case matters

Offline accessibility bridge model with explicit policy; useful for testing semantic API adapters independently of browser implementations.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
contract fixture 3	`[["c", ["Other doc"]]]`	`[["c", []]]`	Failed

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