[standards-jig] Pub/Sub Explanation
mass at akuma.org
Wed Apr 17 04:00:32 UTC 2002
Adam Theo wrote:
> First: a namespace can't be *anything*, can it? no spaces, etc.. it's
> restricted to the URN rules. Second: I am not understanding the
> distinction between a topic and a category. I assume topic is the
> subject of the published material, but what good would a category be for?
Actually, its limited by URI rules (just being pedantic). A topic is a
pub/sub term; it is the thing you are actually publishing on/subscribing
to. AFAIK, it doesn't have any meaning beyond that associated with it.
I think a category was the information defining what a topic 'means' -
whether it is persistant, or destroyed when the publisher becomes
unavailable, whether subscriptions to it are durable, and also things
such as the format of the messages being published.
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