*   Analytical OLAP
*   Key value
*   Graph
*   Column family (HBase)
    *   Column-oriented store ([Vertica](http://www.vertica.com/hp-vertica-products/sqlonhadoop/))

*   Relational
*   Document

### Miscellaneous

*   [How RDF Databases Differ from Other NoSQL
    Solutions](http://blog.datagraph.org/2010/04/rdf-nosql-diff)
    * See [SPARQL](https://docs.marklogic.com/sem:sparql)