Implementation of an XML based system for content generation and library catalogue cards display.
Incorporated dynamical symbols in drawing CAD & spatial (GIS) systems.
Incorporating an implicit time dimension into the relational model and algebra
Inf-datalog, modal logic and complexities
Inf-Datalog extends the usual least fixpoint semantics of Datalog with greatest fixpoint semantics: we defined inf-Datalog and characterized the expressive power of various fragments of inf-Datalog in [16]. In the present paper, we study the complexity of query evaluation on finite models for (various fragments of) inf-Datalog. We deduce a unified and elementary proof that global model-checking (i.e. computing all nodes satisfying a formula in a given structure) has 1. quadratic data complexity...
Inf-datalog, Modal Logic and Complexities
Inf-Datalog extends the usual least fixpoint semantics of Datalog with greatest fixpoint semantics: we defined inf-Datalog and characterized the expressive power of various fragments of inf-Datalog in [CITE]. In the present paper, we study the complexity of query evaluation on finite models for (various fragments of) inf-Datalog. We deduce a unified and elementary proof that global model-checking (i.e. computing all nodes satisfying a formula in a given structure) has 1. quadratic data complexity...
Inference in a Relation Knowledge-base With two Types of Null Values
Information aspects: A tool for redundancy control of data
Information capability of a database schema
Integrity constraints in distributed databases.
Interval-valued linguistic summaries of databases