# Data models by Geolonia > Data models: JSON Schemas (2020-12), JSON-LD @context files and RDFS vocabularies. Exact versions (v1.0.0) never change; major aliases (v1) follow the latest compatible version. Machine-readable list of every model with all its URLs: https://models.geolonia.com/catalog.json. ## Subject: geolonia (Geolonia), version 0.1.0 Models used in Geolonia projects. - [@context](https://models.geolonia.com/context/geolonia/v0.jsonld): use this alias in data; exact version https://models.geolonia.com/context/geolonia/v0.1.0.jsonld - [Vocabulary](https://models.geolonia.com/vocab/geolonia/v0.1.0.jsonld): RDFS classes and properties, with labels ## Optional - [catalog.json](https://models.geolonia.com/catalog.json): every model with its type IRI, context, schema, vocabulary, examples and page, its attributes, the publisher and the licence