In this paper, we propose a new relational schema (R-schema) to XML Schema translation
algorithm that analyzes the cardinality between data values and patterns of user queries to …

While specification languages for integrity constraints for XML data have been considered in
the literature, actual technologies and methodologies for checking and maintaining integrity …

Key and referential constraints are the two main integrity constraints in database
applications. These constraints can be enforced by the Database Management System …

In this paper, we propose a new relational schema (R-schema) to XML schema translation
algorithm, VQT, which analyzes the value cardinality and user query patterns and extracts …

Distributed database systems (DDBS) usually contain massive collections of data that
rapidly evolve over time. It is extremely time consuming to make a perfect checking at each …

Constraint optimization in distributed databases is an important issue as it can reduce the
amount of time needed to check for the violation of global constraints when updates are …

In today's emerging information systems, it is natural to have data distributed across multiple
sites. We define a System of Databases (SyDb) as a collection of autonomous and …

XML became the standard for exchanging information over the web, and massive data is
used, modified, transferred and stored continuously using XML files. On the other hand …

This thesis presents approaches for detecting faults such as violations of constraints in
databases and anomaly in the usage of database attributes of database applications. It also …

Key and referential constraints play an important role in enforcing data integrity in database
applications. Our study of database applications reveals that there are common patterns of …