multiple maven artifactIds

Hello,

I use Maven to build my projects and I found that there are two kinds of spring jars with different maven artifactIds:

Code:

---

<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>3.0.5.RELEASE</version>

---

and

Code:

---

<groupId>org.springframework</groupId>
<artifactId>org.springframework.beans</artifactId>
<version>3.0.5.RELEASE</version>

---

What is the difference between them?

Best regards,
Lars