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properties/measurement

property token a chosen word

keep-warm function

How the appliance holds its contents warm after heating — a token from KeepWarmModes (none / fixed / adjustable / timed). Answerable for any hot-beverage water-heater (the value is 'none' when there is no hold function), so it homes on WaterHeatingAppliance rather than on a single kind. Optional.

Keep-warm function is answered with one word chosen from the keep-warm modes list — the same word shared across every product that uses it.

It belongs to measurement — its measurable, physical facts.

asked by the kinds that answer it

5 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
Keep-warm modes — the vocabulary its answers are drawn from.
concern
Measurement — 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
water heating appliance one