'maven:maven-checkstyle-plugin:2.3'
<dependency>
<groupId>maven</groupId>
<artifactId>maven-checkstyle-plugin</artifactId>
<version>2.3</version>
</dependency>
<dependency org="maven" name="maven-checkstyle-plugin" rev="2.3"/>
"maven", "maven-checkstyle-plugin", "2.3"