Sqlg is a tinkerpop 3 implementation on top of a rdbms.
'org.umlg:sqlg-hsqldb:1.0.2'
<dependency>
<groupId>org.umlg</groupId>
<artifactId>sqlg-hsqldb</artifactId>
<version>1.0.2</version>
</dependency>
<dependency org="org.umlg" name="sqlg-hsqldb" rev="1.0.2"/>
"org.umlg", "sqlg-hsqldb", "1.0.2"