Data flow

The same product, represented five times. Each arrow is clickable and shows the fields that survived, disappeared, were transformed, or were added by Shopify.

Pipeline

Clickable stages (open the facts) and transitions (open the field-level diff).

Transitions below are computed from the 42-field source matrix and the fact ledger.

Merchant Truth

150

PDP, JSON-LD, merchant docs and support pages.

fields: 32
survive: 5
disappear: 27
transformed: 0
added: 0
facts: 150

Public Shopify Data

108

Product JSON, embedded theme/app state, sitemap.

Terminal layer: 108 inferred facts.

Storefront Catalog

Merchant-scoped UCP catalog representation.

fields: 7
survive: 3
disappear: 4
transformed: 1
added: 11
facts: 33

Global Catalog

Cross-merchant UCP representation + seller offers.

fields: 10
survive: 10
disappear: 0
transformed: 0
added: 11
facts: 33

Shopify Inference

Generated/enriched fields, not merchant-authored.

Terminal layer: 11 inferred facts.

Clickable transitions

Merchant → Storefront and Merchant → Global are the two comparisons that matter. Every field traces back to fact rows.

Merchant semantic fields retained by the Storefront Catalog representation.

Pro Photography Bundle availability (out of stock)PARTIAL
SKU (PK31-BK-4 and siblings)EXACT
Image countPARTIAL
CollectionsEXACT
Canonical URLEXACT

Layer totals

Fact counts per provenance label. A fact belongs to exactly one label.

MERCHANT_AUTHORED 150PUBLIC_SHOPIFY 108STOREFRONT_CATALOG 33SEARCH_ENGINE_OBSERVED 24GLOBAL_BASE 22GLOBAL_INFERRED 11SELLER_OFFER 11

32 merchant-authored facts are the benchmark; the catalogs retain a fraction of the semantic fields those facts describe.