Building the data warehouse (2nd ed.)
Building the data warehouse (2nd ed.)
A framework for supporting data integration using the materialized and virtual approaches
SIGMOD '96 Proceedings of the 1996 ACM SIGMOD international conference on Management of data
The TSIMMIS Approach to Mediation: Data Models and Languages
Journal of Intelligent Information Systems - Special issue: next generation information technologies and systems
Managing semantic heterogeneity in databases: a theoretical prospective
PODS '97 Proceedings of the sixteenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Queries with incomplete answers over semistructured data
PODS '99 Proceedings of the eighteenth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
Semantic integration of heterogeneous information sources
Data & Knowledge Engineering - Special issue on heterogeneous information resources need semantic access
Representing and querying XML with incomplete information
PODS '01 Proceedings of the twentieth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
Reconciling schemas of disparate data sources: a machine-learning approach
SIGMOD '01 Proceedings of the 2001 ACM SIGMOD international conference on Management of data
Learning object identification rules for information integration
Information Systems - Data extraction, cleaning and reconciliation
Fundamentals of Data Warehouses
Fundamentals of Data Warehouses
Combining Multiple Knowledge Bases
IEEE Transactions on Knowledge and Data Engineering
A Graph-Based Approach For Extracting Terminological Properties of Elements of XML Documents
Proceedings of the 17th International Conference on Data Engineering
Don't Scrap It, Wrap It! A Wrapper Architecture for Legacy Data Sources
VLDB '97 Proceedings of the 23rd International Conference on Very Large Data Bases
Generic Schema Matching with Cupid
Proceedings of the 27th International Conference on Very Large Data Bases
Integrating and Managing Conflicting Data
PSI '02 Revised Papers from the 4th International Andrei Ershov Memorial Conference on Perspectives of System Informatics: Akademgorodok, Novosibirsk, Russia
Conflict Tolerant Queries in AURORA
COOPIS '99 Proceedings of the Fourth IECIS International Conference on Cooperative Information Systems
Integration of Semistructured Data with Partial and Inconsistent Information
IDEAS '99 Proceedings of the 1999 International Symposium on Database Engineering & Applications
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In this paper we propose an approach for the extensional integration of data sources with heterogeneous representation formats. The proposed approach is based on the exploitation of a new model, called E-SDR-Network, for representing and handling, at the extensional level, heterogeneous data sources, ranging from databases to XML documents, object exchange model graphs and other semi-structured data. Due to the specific features of E-SDR-Network, the proposed extensional integration methodology is capable of: (i) easily handling null or unknown values, (ii) producing consistent query answers from possibly inconsistent data and (iii) reconstructing, at the extensional level, the content of each data source involved in the integration task. Finally, we show that E-SDR-Network and the proposed extensional integration algorithm are the counterpart, at the extensional level, of the SDR-Network conceptual model and the associated intensional integration algorithm, already proposed in the literature. Therefore, in the whole, we obtain a complete approach consisting of two components performing synergically both the intensional and the extensional integration of data sources having heterogeneous data representation formats.