why doesn't Axis implement the JAXPRC interfaces in the javax.xml.rpc.handler package ??

[Mark D. Hansen]

I'm trying to understand whether or not Axis qualifies as a "JAX-RPC runtime 
implementation".  It seems to support JAXRPC, but why doesn't the 
org.apache.axis.Handler class (for example) implement javax.xml.rpc.handler.Handler?

Thanks,

Mark