is a collaborative project to provide stable digital representations of numismatic concepts according to the principles of Linked Open Data. These take the form of http URIs that also provide access to reusable information about those concepts, along with links to other resources. The canonical format of is RDF/XML, with serializations available in JSON-LD (including geoJSON-LD for complex geographic features), Turtle, KML (when applicable), and HTML5+RDFa 1.1.

While the URIs provided by are stable, the project is in progress and subject to constant expansion and ongoing correction. This is particularly the case for the information provided about each identifier.

The information provided by has been provided by a wide community of scholars and institutions.

The project is steered by a committee currently consisting of: also hosts the Numismatic Description XML Schema

There are two Github repositories associated with the project. The application code is available in The RDF/XML data and ontology versions are in

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