The RichFaces "Bill of Materials". This defines the optional cache dependency versions for RichFaces.
'org.richfaces:richfaces-bom:5.0.0.Alpha2'
<dependency>
<groupId>org.richfaces</groupId>
<artifactId>richfaces-bom</artifactId>
<version>5.0.0.Alpha2</version>
</dependency>
<dependency org="org.richfaces" name="richfaces-bom" rev="5.0.0.Alpha2"/>
"org.richfaces", "richfaces-bom", "5.0.0.Alpha2"