At work I'm replacing our use of org.json with json-lib. The org.json isn't available from a maven repository while json-lib is, and json-lib appears better written. However, json-lib comes in java 1.3 and java 5 (1.5) versions so the jar files in the repository have names like json-lib-1.0.1-jdk15.jar. How do you write a dependency entry for that? Well, you have to use the classifier element.

    <dependency>
        <groupId>net.sf.json-lib</groupId>
        <artifactId>json-lib</artifactId>
        <version>1.0.1</version>
        <classifier>jdk15</classifier>
    </dependency>