A11Y_AXE_TH_HAS_DATA_CELLS
Ensure that <th> elements and elements with role=columnheader/rowheader have data cells they describe Evaluated against the live rendered page by a WCAG rule engine, so it only runs on a full scan.
Impact is importance multiplied by the confidence tier’s weight — SPECIFICATION 1.0, RESEARCH 0.7, EMERGING 0.3, EXPERIMENTAL 0.1. Two rules backed by the same class of evidence therefore always carry the same weight, which is what makes the score reproducible rather than hand-tuned.
Built at scan time by accessibility engine, not from our static registry. That engine evaluates its whole rule set in one pass, so this check cannot be run on its own — it runs as part of a scan.