The development of the Internet in recent years has made it possible and useful to access
many different information systems anywhere in the world to obtain information. While there …

We study the problem of repairing an inconsistent database that violates a set of functional
dependencies by making the smallest possible value modifications. For an inconsistent …

For several reasons databases may become inconsistent with respect to a given set of
integrity constraints (ICs):(a) The DBMS have no mechanism to maintain certain classes of …

Consistent query answering (CQA) is an approach to querying inconsistent databases
without repairing them first. This invited talk introduces the basics of CQA, and discusses …

A database D may be inconsistent wrt a given set IC of integrity constraints. Consistent
Query Answering (CQA) is the problem of computing from D the answers to a query that are …

We extend the OLAP data model to represent data ambiguity, specifically imprecision and
uncertainty, and introduce an allocation-based approach to the semantics of aggregation …

Consistent query answering is the problem of characterizing and computing the semantically
correct answers to queries from a database that may not satisfy certain integrity constraints …

Computing an optimal subset repair of an inconsistent database is becoming a standalone
research problem and has a wide range of applications. However, it has not been well …

The problem of extracting consistent information from relational databases violating integrity
constraints on numerical data is addressed. In particular, aggregate constraints defined as …

Consistent query answering is the problem of computing the answers from a database that
are consistent with respect to certain integrity constraints that the database as a whole may …