Section 6.1. Subscriber Sends Subscription Request of PubSubHubbub Core 0.3 states, "Where repeated keywords are used, their order indicates the subscriber's order of preference." In my mind "preference" is ambiguous with respect to repeated parameters. For example, with "hub.mode" repeated as first "sync" then "async", "preference" implies a one or the other and not both relationship. However, this relationship doesn't make sense for the keyword "hub.topic" which would be better suited to an all relationship.
Is it the intention of the specification to allow subscribers to subscribe to multiple topics with a single request?
