Composing API Models with JSON Schema
Use JSON Schema effectively to build real API request and response bodies
API Design Matters has moved to its, own site, apidesignmatters.org.
This article appears there at Building a Domain Model
I will no longer maintain the content on Substack.
See also Bruno Pedro's article, "Extending Object Definitions With OpenAPI's allOf" ( https://apichangelog.substack.com/p/extending-object-definitions-with-allof ) for a different take on schema composition with allOf