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Tagged input: Subscriptions in a calendar suite may be marked as "Topical Areas" “Topical Areas” and assigned categories. Topical Areas appear in the add event form for the calendar suite and provide a means for event administrators to tag events by one or many categories. A subscription that is not marked as a topical area won't appear in the add event form for tagging and is, in essence, read-only; a subscription to an external holiday feed is a good example.
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Opening up the tree, we find calendar aliases that can be used by calendar suites for building subscriptions. The calendar aliases are centrally curated, pre-filtered subscriptions. The /public/aliases branch is also used to generate the listing of "suggested “suggested topical areas" areas” for the public submissions web client. Event administrators refine these when they pick up the event for publication. The branch is likewise exposed to personal calendar users as a subscription source within the personal client.
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