JOMC is split in various artifacts you may want to manage using the dependencyManagement of your pom.xml.
...
<dependencyManagement>
<dependencies>
...
<dependency>
<groupId>org.jomc</groupId>
<artifactId>jomc-util</artifactId>
<version>1.6.x</version>
</dependency>
<dependency>
<groupId>org.jomc</groupId>
<artifactId>jomc-modlet</artifactId>
<version>1.6.x</version>
</dependency>
<dependency>
<groupId>org.jomc</groupId>
<artifactId>jomc-model</artifactId>
<version>1.6.x</version>
</dependency>
<dependency>
<groupId>org.jomc</groupId>
<artifactId>jomc-api</artifactId>
<version>1.6.x</version>
</dependency>
<dependency>
<groupId>org.jomc</groupId>
<artifactId>jomc-spi</artifactId>
<version>1.6.x</version>
</dependency>
<dependency>
<groupId>org.jomc</groupId>
<artifactId>jomc-ri</artifactId>
<version>1.6.x</version>
</dependency>
...
</dependencies>
</dependencyManagement>
...
<dependencies>
...
<dependency>
<groupId>org.jomc</groupId>
<artifactId>jomc-api</artifactId>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.jomc</groupId>
<artifactId>jomc-ri</artifactId>
<scope>runtime</scope>
</dependency>
...
</dependencies>
...