Three layers, each doing one job
Nothing is overwritten
Every value is collected and kept exactly as the manufacturer published it, tagged with where it came from. If a translation rule gets smarter later, it re-runs against this — nothing has to be re-collected.
One schema, applied deterministically
A reviewed mapping dictionary turns each source's own vocabulary into a shared set of keys — the same key, the same unit, regardless of which manufacturer it came from.
The same part, tied together
GTINs, ETIM/eClass codes, and distributor SKUs cross-reference so the same physical product collected from different places resolves to one record, not duplicates.
What "manufacturer-verified" actually means
Distributor catalogs are a fine way to discover that a part number exists — that's just sourcing. But the source shown for a product's specs is never a distributor re-listing. It's the manufacturer's own product page, or the product isn't marked verified.
93% of the database meets that bar today. The remaining 7% — mostly brands not yet crawled directly from their own site — is shown, not hidden, and labeled as pending verification.
source_key (the raw label)
confidence score
source_url (manufacturer page)
fetched_at (timestamp)
The LLM designs the rule once. It doesn't guess the answer each time.
The distinction matters more than it sounds like it should.
- What we don't do: ask a model to read a spec sheet and guess the current rating every time a product is imported. That's expensive, unreproducible, and a wrong answer is silent.
- What we do instead: for each new source, use LLM assistance once to draft a translation rule — "this label, in this source, means this canonical key, parsed this way." A person reviews that rule.
- Then it's deterministic: a plain parser applies the reviewed rule to every product from that source. Same input, same output, every time — and it's auditable, because the rule is a readable file, not a model's internal weights.
Change is a diff, not a surprise
Every import is versioned rather than overwritten in place. When a rating changes or a part is discontinued, it shows up as an old value, a new value, a manufacturer link, and two timestamps — a claim you can independently verify, not a notification you have to take on faith.
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