---
type: Reference
id: https://w3id.org/ktl/knowledge/references/linkml
title: LinkML (linkml.io)
description: The schema-modelling language LOKF is written in, and the generator suite that turns a schema into JSON Schema, Pydantic models, SHACL shapes, docs, and OWL.
genre: reference
resource: https://linkml.io/linkml/
generated:
  by: process:ktl-librarian
  at: "2026-10-13T15:08:54Z"
status: draft
verified:
- by: process:ktl-librarian
  at: "2026-10-12T03:11:32Z"
---

# Overview

LOKF is defined as a LinkML schema, which is why its JSON Schema, JSON-LD context, SHACL shapes, and OWL ontology are all generated artifacts rather than hand-maintained files.

LinkML matters to a bundle owner at exactly one moment: when LOKF's vocabulary stops fitting a deep or safety-critical domain. The answer is a LinkML domain schema that imports LOKF's and validates with `lokf validate --schema <file>`. The recipe is the librarian skill's `references/domain-schema.md`. The same schema also yields Pydantic models, JSON Schema and rendered documentation, for people who think in JSON or Python rather than in RDF.