'activemq:activemq-optional:3.1-M2'
<dependency>
<groupId>activemq</groupId>
<artifactId>activemq-optional</artifactId>
<version>3.1-M2</version>
</dependency>
<dependency org="activemq" name="activemq-optional" rev="3.1-M2"/>
"activemq", "activemq-optional", "3.1-M2"