Catalog & data

GTIN

Global Trade Item Number

Definition

The GS1 identifier behind UPC (GTIN-12), EAN (GTIN-13) and ITF-14 barcodes. It identifies a specific trade item, so the same product can be matched across retailers, marketplaces and shopping engines.

Defined in Product Catalog Enrichment for AI Shopping: The Playbook.

Where GTIN comes up

The guides that put this term to work, rather than just defining it.

Related terms

Product catalog enrichment: The process of turning product facts into structured, validated fields (attributes, identifiers, variant data, offer and policy data) and keeping them accurate across every channel that reads them, so people and AI systems can filter, compare and quote them.
Structured attribute: A named, machine-readable field with a discrete value — material: leather, sleeve_length: short — as opposed to the same fact buried in a marketing sentence.
Category metafield: A Shopify metafield tied to a category in the Standard Product Taxonomy (where it's called a product attribute), such as size, color or material, with predefined values that can be linked to variant options and reused across products.
Shopify metafield: A custom structured field on a Shopify product, collection, or variant — the mechanism most mid-market merchants use to add attributes without a separate PIM.
Category attribute template: A fixed, reusable list of the attribute fields every SKU in a given category must carry — e.g. every hiking boot gets material, closure, waterproof rating, sole type, weight — built once per category and then applied to every SKU in it.
Product taxonomy: The hierarchical category structure a catalog is organized under, which agents use to scope what "kind" of product they're reasoning about before checking specific attributes.

All 157 terms

Put a number on your catalog debt

What missing attributes, thin copy and bad variants cost you in lost conversions each year.

Calculate catalog debt Catalog Enrichment for AI