Product modelling, variants, attributes, taxonomy and enrichment.
3 questions in E-commerce & Retail.
Measure completeness per category against the filters shoppers use, not across the whole catalogue. Then fix it at the source with required attributes per category and supplier gates, infer only with recorded provenance, and suppress a filter whose coverage is too low to be honest.
Separate the product a customer shops for from the variant that carries a barcode and stock, decide which attributes are variant-defining rather than merely descriptive, and hold the rest in a typed per-category schema, because a fixed column set cannot grow and an untyped bag cannot be trusted.
You cannot know without matching, and matching is the work: suppliers send their own identifiers, spell the same manufacturer three ways, and describe attributes in units you do not use. Treat ingestion as a matching problem with a confidence threshold and a review queue, not as an import.