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properties /facet

property token a chosen word

armrest

also called arms

Whether a seat has arm supports and of what kind — armless (a side chair / armless settee, no arms), fixed arms (an armchair or sofa with non-moving arms), or adjustable arms (height/width-adjustable arms). The armchair-vs-side-chair distinction is a genuine buy choice but adds no exclusive structural slot (an armless and an armed seat share the Seat slot-profile), so it is a property on Seat, not a separate class. Optional. Concern facet, axis-eligible.

Armrest is answered with one word chosen from the armrest types list — the same word shared across every product that uses it.

It belongs to facet — one facet of a product.

asked by the kinds that answer it

1 kind answers 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
Armrest types — the vocabulary its answers are drawn from.
concern
Facet — 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
seat one