[cas-dev] how can i get the protocol of single sing out?

[fight 1999]

i have seen cas add new feature of "Single Sign Out Protocol" in the
following page:

ihttp://www.ja-
sig.org/products/cas/announcements/cas_server_3_1_rc1/index.html

but i can't find the protocol specification,how can i get it?

thanks.
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