Introductory note for SSO proposal

[Guy Rixon]

Hi,

I've split the introductory material out of the single-sign-on proposal as
promised and drafted it as an IVOA note:

http://www.ivoa.net/internal/IVOA/IvoaGridAndWebServices/SSO-introduction.htm

Let me know if you think this needs changing: content, presentation, whatever.
If nobody wants any changes, then I'll pass the note to Marco as v1.0 around
the end of next week.

The actual profiles will follow.

Cheers,
Guy

Guy Rixon 				        gtr at ast.cam.ac.uk
Institute of Astronomy   	                Tel: +44-1223-337542
Madingley Road, Cambridge, UK, CB3 0HA		Fax: +44-1223-337523