Panel scope for multi-panel (faceted / composed) binds.
When a binder extracts one panel of a multi-panel figure, its extraction
root is the panel element — not the outer SVG. Emitted selectors must still
be anchored to the OUTER SVG's page-unique id, which names the chart, and
additionally narrowed to the panel via the data-maidr-panel attribute:
every panel is in the same chart, so panel A's selector would otherwise
match panel B's marks.
Panel scope for multi-panel (faceted / composed) binds.
When a binder extracts one panel of a multi-panel figure, its extraction root is the panel element — not the outer SVG. Emitted selectors must still be anchored to the OUTER SVG's page-unique id, which names the chart, and additionally narrowed to the panel via the
data-maidr-panelattribute: every panel is in the same chart, so panel A's selector would otherwise match panel B's marks.