Alia's functional analysis presentation at today's I2RS meeting proposed three 
characteristics to an operation:

Start-Time (immediate, temporal, triggered)
Persistence across reboots (permanent, ephemeral)
Duration/State-expiration (unbounded, temporal)

I'd like to ask about the option to set a start (and presumably stop) time and 
the option to specify a duration. I assume the intention is to support these 
options for every item of I2RS installed state or configuration. I am wondering 
whether these time-based options are an essential part of the I2RS interface? 
Could we not simply require the client to install or remove the 
state/configuration at the desired time, thus eliminating the additional 
complexity in the I2RS interface itself and moving complexity from the network 
device to the controller? Are there use cases where the client cannot take 
action at the desired time?

(I get the reason for triggered events.)

Thanks,

Rob
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