The RichFaces "Bill of Materials". This defines the optional cache dependency versions for RichFaces.
'org.richfaces:richfaces-cache-bom:4.5.2.Final'
<dependency>
<groupId>org.richfaces</groupId>
<artifactId>richfaces-cache-bom</artifactId>
<version>4.5.2.Final</version>
</dependency>
<dependency org="org.richfaces" name="richfaces-cache-bom" rev="4.5.2.Final"/>
"org.richfaces", "richfaces-cache-bom", "4.5.2.Final"