When configuring database persistent repositories the same concept of datasource JNDI name could be used in different contexts with different names:

<repository name="foo">  
  <db-persistence datasource-jndi="java:jboss/datasources/bar"/>  
  <db-binary-storage data-source-jndi-name="java:jboss/datasources/bar"/>  
</repository>

It would be more clear, straightforward and usable to have one attribute name for one concept.