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properties /identity

property token a chosen word

heel height

The height tier of a shoe's heel — the rise of the heel under the sole, bucketed into the named tiers retailers actually sell and filter by: flat (under ~0.5 in), low (~0.5–1.5 in), mid (~1.5–3 in), high (~3–4 in) and ultra-high (~4 in and up). It is the lead footwear filter on Zappos, Nordstrom and Clarks. Distinct from the physical `height` dimension (overall extent in length units): this is a categorical fit/style tier, not a measured millimetre rise — the exact measured heel is a downstream Seedbed detail, the inch ranges here are label legibility only. Distinct too from `shaft_height` (how far a boot's shaft rises up the LEG, statable only of boots) — heel height is statable of all footwear. It is an IDENTITY discriminator, not a buyable facet: on real catalogues heel height is a CATEGORY filter that navigates to DIFFERENT listings (a flat and a 4-inch stiletto are distinct products, each its own SKU/reviews), never a single-product buy-box toggle — a given shoe simply IS a fixed heel tier, the way it has a fixed silhouette. Grouped in the `identity` concern, so by the derived-axis rule it is NOT axis-eligible — a seller never offers one shoe across heel heights as buy-box versions. Optional and single: every shoe has a heel height, but most flat/sneaker listings omit it (absent reads as the flat/low tier) and only heeled-shoe listings state it; reused across all footwear (Footwear, Boot, Sandal).

Heel height is answered with one word chosen from the heel heights list — the same word shared across every product that uses it.

It belongs to identity — who and what it is.

asked by the kinds that answer it

3 kinds answer it, each for a single value. The same question can be reused by unrelated kinds — one meaning, many homes.

answered with
token — a token — a word chosen from a fixed vocabulary, shared and filterable across products.
value domain
Heel heights — the vocabulary its answers are drawn from.
concern
Identity — the facet of a product it belongs to.

asked by kinds that answer it

The same question can be reused by unrelated kinds — one meaning, many homes.

kindhow many
footwear one