If you look at the postings on Twitter or status updates on Facebook, one very soon realizes that if there is any important event then there are many ‘metaevents’ around it. Suppose that there is an event: a concert. Many people like to post updates expressing their opinions about the concert. Also, many posts will be related to their experience of attending the concerts, many photos or videos from the concert etc. This is a common situation. If one analyzes these sites — so called real time updates are really centered around a major real physical event. There may be an update related to the main event and then there are all these updates related that main event. All these updates related to the main event may be considered metaevents.
Another example: there is an important report in New York Times. Publishing of that report may be considered an event. Now there will be many tweets giving link to that report, many blogs about that report. All these are metaevents. These are events about an event. One should clearly distinguish between an event and metaevents. Like metadata, metaevents may play very important role in understanding events and their effects and implications.