Why it matters
Map your electrical SKUs to ETIM classes and every product gets the same machine-readable features: voltage, poles, rating. That is the normalized-attribute backbone an LLM needs to compare products. Without it, a circuit breaker reads as free-text marketing copy. With it, the breaker carries a defined feature set an engine can parse, filter, and quote. ETIM is free and published, so the cost is mapping work, not licensing.
ETIM vs a custom attribute schema
A homegrown schema fits your catalog and nobody else's. ETIM is shared across manufacturers and distributors, so a supplier's ETIM-tagged data drops into your PIM without re-mapping every feature. The trade-off: ETIM classes are broad and standardized, so they may not cover a niche attribute your buyers ask about. Many distributors run ETIM as the base layer and extend it for the gaps.
In practice
A distributor receives a manufacturer feed tagged to ETIM class EC000123 (a molded-case circuit breaker). The feed already carries rated current, breaking capacity, and pole count as discrete features. The distributor loads it straight into their PIM, and product pages expose those features as structured data. When a buyer asks an AI engine for a 250A three-pole breaker, the engine has clean attributes to match against instead of guessing from prose.