Diapositive PPT
Requirements imposed by alerting services in digital libraries
- 100 K+ of subscribers & few publishers (e.g., 10)
- low event rates (e.g., 10+ / hr)
- event size: publication record(s) (e.g., {Author, title, …}) or entire documents
- simple subscription languages suffice (conjuncts only)
- subscriptions change infrequently (e.g., 5 / user / month)
- low notification rate (e.g., 5 / user / week)
- unreliable notification semantic sufficient
- notification propagated mostly via e-mail