attributes in AC

[Hideyuki Odahara <[e-mail]>]

Please teach me the difference of the use of
"Service Authentication Infomation" and "Access Identity" 
in Attribute Certificate, and how to use the "Access Identity" 
attribute if you have any concrete example.

It is described that "this is a different use to that intended
for the svceAuthInfo attribute discribed in 4.4.1 above." at the
page 19 in the internet-draft(draft-ietf-pkix-ac509prof).
But there is no example what situation does it suit.

thanks

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  Hideyuki Odahara ： [e-mail]