Lutra - the reference implementation of the OTTR framework

Reasonable Ontology Templates (OTTR) is a language with supporting tools for representing and instantiating RDF graph and OWL ontology modelling patterns. It is designed to improve the efficiency and quality of building, using, and maintaining knowledge bases. 

Lutra is an open source (LGPL licence) reference implementation of the OTTR language. Lutra can read and write OTTR templates and instances on different serialisation formats, and expand instances into regular RDF graphs. Lutra is written in Java and is available as a command line interface, and as feature limited version web application.