GeoLeaf Core API - v3.0.0
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    AttributeEmphasis: "title" | "category" | "subcategory"

    Visual emphasis applied to a field on a reading surface.

    These are the ONLY three values the render code branches on, out of the 29 the legacy FieldStyle union declared. The other 26 produced neither a branch nor a CSS class — measured, and the reason they are not carried over.

    title lifts the field into the heading position; category and subcategory each carry a badge modifier that exists in the stylesheet.