The role of abduction in database view updating

摘要

The problem of view updating in databases consists in modifying the extension of view relations (i.e., relations defined in terms of “base” ones) transforming only the content of the extensional database, i.e., the extensional representation of base relations. This task is non-deductive in nature and its relationships with non-monotonic reasoning, and specifically with abduction, have been recently pointed out.