GrHyMM: A Graph-Oriented Hybrid Multidimensional Model
The main methodologies for the data warehouse design are based on two approaches which are opposite and alternative each...
Partial Multi-dimensional Schema Merging in Heterogeneous Data Warehouses
In recent years, novel approaches and architectures to support Data Warehouse integration (like the P2P Data Warehouse , also...
Ontologies and Functional Dependencies for Data Integration and Reconciliation
Integrating data sources is the key success of business intelligence systems. The exponential growth of autonomous data sources over...
Knowlog: A Declarative Language for Reasoning about Knowledge in Distributed Systems
In the last few years, researchers started to investigate how recursive queries and deductive languages can be applied to...
A Comprehensive Framework on Multidimensional Modeling
In this paper we discuss what current multidimensional design approaches provide and which are their major flaws. Our contribution...
A Preference-Aware Query Model for Data Web Services
Data Mashup is a special class of applications mashup that combines data elements from multiple data sources (that are...
User Feedback Based Query Refinement by Exploiting Skyline Operator
This paper presents FlexIQ, a framework for feedback based query refinement. In FlexIQ, feedback is used to discover the...
A NFR-Based Framework for User-Centered Adaptation
Pervasive environments support users’ daily routines in an invisible and unobtrusive way. To do so, they include a technical...
Concept-Based Web Search
Traditional web search engines are keyword-based. Such a mechanism is effective when the user knows exactly the right words...
A Linear Algebra Technique for (de)Centralized Processing of SPARQL Queries
We are witnessing the evolution of the Web from a worldwide information space of linked documents to a global...
