Reasonable Ontology Templates, OTTRs for short, are OWL ontology macros capable of representing ontology design patterns (ODPs) and closely integrating their use into ontology engineering. An OTTR is itself an OWL ontology or RDF graph, annotated with a special purpose OWL vocabulary. This allows OTTRs to be edited, debugged, published, identified, instantiated, combined, used as queries and bulk transformations, and maintained—all leveraging existing W3C standards, best practices and tools. We show how such templates can drive a technical framework and tools for a practical, efficient and transparent use of ODPs in ontology design and instantiation. The framework allows for a clear separation of the design of an ontology, typically managed by ontology experts, and its bulk content, provided by domain experts. We illustrate the approach by reconstructing the published Chess Game ODP and producing linked chess data.