Product Data in DIY & Hardware Retail: Classified Core, Chaotic Longtail

Walk any DIY store and you're looking at two completely different product worlds sold under one roof. On one side: cordless drills, wall plugs, hinges, silicone cartridges — technical goods with deep, measurable attributes. On the other: seasonal planters, decorative lanterns, batteries, garden fertiliser — a sprawling longtail that changes every season. Both sit in the same shop and the same webshop, but their product data could not be more different.

Product data in DIY and hardware retail is a split assortment: a classified technical core that suppliers deliver via ETIM/proficl@ss and BMEcat, and a standard-less longtail that arrives as Excel and PDF from countless suppliers. Understanding that split is the whole game — because the standard solves one half beautifully and the other half not at all. This guide maps both, and shows where a PIM built for DIY retailers takes over.

How is proficl@ss / ETIM used for the technical core?

The technical heart of the hardware trade is where standards shine. proficl@ss is the classification standard developed specifically for the DIY, hardware and building-materials trade; ETIM is the dominant classification in the electrical and technical trades and increasingly used alongside it. Both do the same essential job: they define a shared class for a product ("cordless drill") and a fixed set of attributes for that class (voltage, chuck size, torque, battery type), so that every supplier describes the same product the same way.

For the core assortment — power tools, hand tools, fasteners, fittings, building chemistry — this works well. The big listed brands classify their catalogs, so their voltage, dimensions, material and thread specs arrive machine-readable and comparable. That's exactly the data you need to build filters, comparison tables and clean category pages. Where a real classification exists, you should lean on it — this is the same picture we describe in how the big product data standards work.

The neighboring trades share this backbone. Industrial supply and C-parts lean heavily on eCl@ss and DATANORM, and plumbing and heating (SHK) runs on ETIM plus DATANORM — so a DIY retailer with a pro/trade side already touches all of these.

Why is the longtail pure unification work?

Now the other half. Alongside the classified core sits a vast longtail that no standard covers: seasonal décor, garden consumables, cleaning supplies, no-name accessories, promotional goods. These come from hundreds of small suppliers, and each one delivers in its own way:

• Raw Excel: a spreadsheet with columns named "Bez", "VE", "Var_1" and half the attributes missing.
• PDF catalogs: a beautifully laid-out brochure where the specs live inside images and tables, not in a feed.
• No classification: no ETIM class, no proficl@ss group — just a product name and a price.
• Seasonal churn: the assortment turns over every quarter, so the effort never stops.

This is where the days in spreadsheets go. Every new seasonal supplier means re-mapping columns, inventing categories, writing descriptions from scratch and hunting down images. It's the same root cause every multi-brand retailer faces — no two suppliers deliver alike — just concentrated in the part of the assortment the standards forgot.

What role does BMEcat play as a transport format?

BMEcat is the standard XML transport format for exchanging B2B product catalogs, and it's the workhorse of the DIY, industrial and electrical trades. It's important to be precise about what it does: BMEcat is not a classification — it's the envelope. It carries the ETIM/proficl@ss classification, attributes, prices, and media references in one structured, machine-readable file, so a supplier can hand you their entire classified catalog in a single import.

For the core, that's a clean pipeline: supplier classifies via ETIM/proficl@ss, packages it as BMEcat, you import it. But BMEcat only helps for suppliers who actually maintain a classified catalog. The seasonal décor vendor with an Excel sheet has no BMEcat to give you — so a transport standard for the core does nothing for the longtail. You still need one system that can take BMEcat on one side and messy files on the other and fold them into the same structure.

Which sub-segments does DIY & hardware cover?

The DIY world is broad. These are the main sub-segments a hardware retailer typically juggles — each with its own mix of classified core and standard-less longtail:

• Hand tools — hammers, screwdrivers, wrenches, measuring.
• Power tools — cordless and corded, plus batteries and accessories.
• Fasteners & fixings — screws, plugs, anchors, adhesives.
• Paints & lacquers — coatings, primers, application tools.
• Building chemistry — silicones, sealants, mortars, foams.
• Garden & construction technology — pumps, hoses, machines, seasonal goods.

Adjacent to these sit whole industries of their own — the deeply technical industrial supply and C-parts world, the plumbing and heating (SHK) trade, and the garden and plants assortment where living goods and seasonal turnover add their own data quirks.

How does Productbay help in DIY & hardware retail?

The job is to run both worlds in one system, and that's exactly what Productbay is built for:

• Consolidate: import standard BMEcat catalogs for the classified core and, in parallel, raw CSV, Excel, feed URLs, FTP and PDF datasheets for the longtail — matched by SKU or EAN so existing products update and new ones are created.
• Enrich: AI takes the standard-less longtail and does the heavy lifting — parsing attributes out of titles and datasheets, assigning categories, writing descriptions, filling gaps from whitelisted sources and translating via DeepL, always with a review queue before publishing.
• Publish: two-way sync to Shopify and Shopware, ERP connections (Xentral, weclapp) and feed exports for Amazon, OTTO and Kaufland — each with per-channel transformations.

Crucially, Productbay starts where the classification stops. If your tool and fastener core is already fed by ETIM/proficl@ss BMEcat, great — Productbay complements it and handles the seasonal, décor and consumable longtail the standard never covered. It's the same pattern across every trade, described in the multi-brand retailer overview: a strong core standard, a chaotic longtail, and one system that unifies both. Productbay is built for DIY and hardware retailers of every size, from single-store operations to large chains.

The six segments in detail: hand tools, power tools, fasteners, paints and coatings, construction chemicals and garden and power equipment.

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