[Air-l] allocution, consultation, conversion and registration on the internet

[Opgenhaffen Michaël]

Doing research about communication online, the model of information-flow of Bordewijk & Van Kaam (1982) (Van Dyk has based his model on this one) seems to be very popular to show the change of the communication pattern from allocution to consultation and conversation. 
So far, I'm in. 
 
My question is for those who know this model well: what's the exact definition of the 'registration' pattern and could you give an example? 
Is RSS or google-alerts an example of registration? 
 
Thanx for the help in advance!
 
Michaël