vldb09-BelieveAnn-Suciu

"Believe It or Not: Adding belief Annotations to Databases", W. Gatterbauer, M.Balazinska, N.Khoussainova, D.Suciu

• Define a belief database as a set of belief statements. It contains base information in the form of ground tuples, annotated with belief statements
  
• Describe a model of database annotations that allow users to annotate both the content and other users' annotations with belief
  
• Use of a concrete semantics to annotations that helps users engage in a structured discussion on content and each other's annotations.
  
• Assume, by default, that a user believes every belief statement that is in the database, unless stated otherwise
• The annotations are of the boolean logical form: "Bob believes that Alice saw X"; "Bob does not believe that Alice saw X"
  
• The experiment proved that the actual overhead of belief annotations can be significantly lower than their theoretic bound