qualifier token a chosen word

which electrode

also called centre or ground · electrode side

WHICH of a plug's two electrodes a statement is about. It exists because the answer genuinely differs between them on the same part, which is not a hypothetical: Denso's SK20HR11 is published with a 0.7 mm IRIDIUM centre electrode and a PLATINUM ground electrode, and NGK's Laser Iridium range the same way — an iridium disc laser-welded on the centre, a platinum disc on the ground. A single unqualified "electrode material" would have to pick one of the two and throw the other away, and would then report the same word for a genuine double-platinum plug and for an iridium/platinum one. [L11 qualifiers: an intra-host bundle, each statement carrying its own side.] IT IS NAMED `electrode_side` AND NOT `electrode_position` DELIBERATELY: "Electrode Position" is Denso's own published field name for a DIFFERENT fact — the projection in millimetres, as in its reach code A, "19.0 mm (Electrode Position: 7 mm)" — which this batch mints as `spark_position`. Spending the trade's word on the wrong fact would guarantee a mis-mapping at intake.

Which electrode is answered with one word chosen from the electrode sides list — the same word shared across every product that uses it.

It is a qualifier of electrode tip diameter — it has meaning only inside a electrode tip diameter statement, never on its own. It belongs with electrode tip diameter to measurement — its measurable, physical facts.

It is answered inside every electrode tip diameter statement, not as a standalone question on a kind.

answered with: ◇token — a token — a word chosen from a fixed vocabulary, shared and filterable across products.
value domain: Electrode sides — the vocabulary its answers are drawn from.
qualifier of: electrode tip diameter — required_one per statement — it has meaning only inside that host's statement.

Answered inside every electrode tip diameter statement — not a standalone slot on any kind.