Broadcast of subscriptions (Gryphon):

2

1

3

4

5

6

p

s

s

s

S1

e

Notification propagation rule:

A server Si sends events e to its neighbor Sj if

- Sj has sent a subscription S to Si and

- e matches S.

e

S1

S1

S1

S1

S1

,S2,S3

,S2,S3

,S2,S3

e matches S2,S3

but not S1

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