Definition
SHACL, the Shapes Constraint Language, validates an RDF data graph against constraints expressed in a shapes graph. Shapes can require properties, restrict value counts, and check datatypes. Conformance means the supplied data satisfies the specified checks; it does not establish that every product claim is true.
Why It Matters
- A catalog graph can contain valid links while a sellable variant still lacks a required identifier or has an invalid quantity value.
- Within a Commerce Intelligence OS, explicit data contracts make rejected facts easier for catalog owners to investigate.
How It Works
- Identify the RDF entities and workflow boundary to validate. Define which variants, offers, or supplier records each shape targets.
- Specify required properties and valid values using appropriate SHACL constraints. For example, a merchant-scoped variant shape can require exactly one SKU literal.
- Run validation on the candidate graph and retain the report with the data and shape versions. Route violations to the responsible catalog owner.
- Define release policy for validation results and rerun after corrections. A passing shape cannot replace source verification, and constraints apply only to the targeted data supplied.
Ecommerce Example
Context: Illustrative example: a supplier import creates a variant with two distinct SKU values where the merchant contract requires exactly one.
Recommended move: A property shape with minimum count one and maximum count one reports the violation before the graph is released to a product assistant.
Why it matters: The owner resolves the conflicting source values. This is a proposed ontology-quality workflow, not a claim about current iKawn graph storage.
iKawn Framework
Define
The iKawn ontology framework associates product entities with explicit requirements.
Validate
Check candidate facts against versioned shapes.
Resolve
Connect validation evidence to the source and accountable owner.
Release
Make approved graph versions available to commerce decisions.
Concise Summary
SHACL turns selected graph requirements into executable validation. Pair conformance with source evidence and a clear release policy.