PubSub: Stay Updated on a Subject of Interest
PubSub is something entirely different. It is a tool for staying constantly updated on references to a topic of continuing interest that appear in blogs, online discussions called news groups, SEC filings and news releases.
In a normal search, you type in a term and the search engine tries to match it against an index of Web sites. It’s a one-time process. But in a PubSub search, your search terms stay constant and are continuously matched against a changing stream of data gleaned from PubSub’s sources. When a match occurs, even if it’s months after you entered your search term, it pops up in PubSub and you’re notified. This seems similar to Google’s News Alert feature, but not just limited to news feeds.