In maven it's "org.apache.commons.collections:commons-collections" the same as "commons-collections:commons-collections"?

I just saw on my pom files that there are two different group id's for Apache commons-collections:

<dependency>
    <groupId>commons-collections</groupId>
    <artifactId>commons-collections</artifactId>
</dependency>

And this one:

<dependency>
    <groupId>org.apache.commons.collections</groupId>
    <artifactId>commons-collections</artifactId>
</dependency>

Are these two the same? and if they are the same, which one should is use by convention?

Solution

For commons-collections version 3, there is no groupId: org.apache.commons.collections, so prior to version 4 use:

<dependency>
  <groupId>commons-collections</groupId>
  <artifactId>commons-collections</artifactId>
  <version>3.2.2</version>
</dependency>

Since version 4:

<dependency>
  <groupId>org.apache.commons</groupId>
  <artifactId>commons-collections4</artifactId>
  <version>4.1</version>
</dependency>

Note that the artifact id has changed to commons-collections4.