A comparative analysis of methodologies for database schema integration
ACM Computing Surveys (CSUR)
Updating derived relations: detecting irrelevant and autonomously computable updates
ACM Transactions on Database Systems (TODS)
View updates in relational databases with an independent scheme
ACM Transactions on Database Systems (TODS)
Federated database systems for managing distributed, heterogeneous, and autonomous databases
ACM Computing Surveys (CSUR) - Special issue on heterogeneous databases
An approach to knowledge base management
An approach to knowledge base management
Language features for interoperability of databases with schematic discrepancies
SIGMOD '91 Proceedings of the 1991 ACM SIGMOD international conference on Management of data
SIGMOD '91 Proceedings of the 1991 ACM SIGMOD international conference on Management of data
Updating relational databases through object-based views
SIGMOD '91 Proceedings of the 1991 ACM SIGMOD international conference on Management of data
Conceptual database design: an Entity-relationship approach
Conceptual database design: an Entity-relationship approach
Data manipulation in heterogeneous databases
ACM SIGMOD Record
An approach for reverse engineering of relational databases
Communications of the ACM
Automated resolution of semantic heterogeneity in multidatabases
ACM Transactions on Database Systems (TODS)
Using semantic values to facilitate interoperability among heterogeneous information systems
ACM Transactions on Database Systems (TODS)
On resolving schematic heterogeneity in multidatabase systems
Modern database systems
Reverse engineering of relational databases: extraction of an EER model from a relational database
Data & Knowledge Engineering
Object orientation in multidatabase systems
ACM Computing Surveys (CSUR)
Semantic heterogeneity in multidatabase systems
Object-oriented multidatabase systems
Database integration using the open object-oriented database system VODAK
Object-oriented multidatabase systems
Research problems in data warehousing
CIKM '95 Proceedings of the fourth international conference on Information and knowledge management
Object Database Standard: ODMG-93, Release 1.2
Object Database Standard: ODMG-93, Release 1.2
Model independent assertions for integration of heterogeneous schemas
The VLDB Journal — The International Journal on Very Large Data Bases
System-Guided View Integration for Object-Oriented Databases
IEEE Transactions on Knowledge and Data Engineering
ViewSystem: Integrating Heterogeneous Information Bases by Object-Oriented Views
Proceedings of the Sixth International Conference on Data Engineering
MedMaker: A Mediation System Based on Declarative Specifications
ICDE '96 Proceedings of the Twelfth 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
VLDB '91 Proceedings of the 17th International Conference on Very Large Data Bases
Processing Queries Over Generalization Hierarchies in a Multidatabase System
VLDB '83 Proceedings of the 9th International Conference on Very Large Data Bases
Schema Transformation Techniques for Database Reverse Engineering
ER '93 Proceedings of the 12th International Conference on the Entity-Relationship Approach: Entity-Relationship Approach
Resolving Fragmentation Conflicts in Schema Integration
ER '94 Proceedings of the13th International Conference on the Entity-Relationship Approach
Extracting an Entity Relationship Schema from a Relational Database through Reverse Engineering
ER '94 Proceedings of the13th International Conference on the Entity-Relationship Approach
Reverse Engineering of Relational Database Applications
OOER '95 Proceedings of the 14th International Conference on Object-Oriented and Entity-Relationship Modelling
Semantic and schematic similarities between database objects: a context-based approach
The VLDB Journal — The International Journal on Very Large Data Bases
Universal Data Access with OLE DB
COMPCON '97 Proceedings of the 42nd IEEE International Computer Conference
A mapping strategy for querying multiple object databases with a global object schema
RIDE '95 Proceedings of the 5th International Workshop on Research Issues in Data Engineering-Distributed Object Management (RIDE-DOM'95)
Towards heterogeneous multimedia information systems: the Garlic approach
RIDE '95 Proceedings of the 5th International Workshop on Research Issues in Data Engineering-Distributed Object Management (RIDE-DOM'95)
A mediation infrastructure for digital library services
DL '00 Proceedings of the fifth ACM conference on Digital libraries
A relational algebra for data/metadata integration in a federated database system
Proceedings of the tenth international conference on Information and knowledge management
How foreign function integration conquers heterogeneous query processing
Proceedings of the tenth international conference on Information and knowledge management
EDBT '02 Proceedings of the 8th International Conference on Extending Database Technology: Advances in Database Technology
Providing semantically equivalent, complete views for multilingual access to integrated data
ER '07 Tutorials, posters, panels and industrial contributions at the 26th international conference on Conceptual modeling - Volume 83
Declarative mediation in distributed systems
ER'00 Proceedings of the 19th international conference on Conceptual modeling
Quality-driven query answering for integrated information systems
Quality-driven query answering for integrated information systems
From the heterogeneity jungle to systematic benchmarking
MODELS'10 Proceedings of the 2010 international conference on Models in software engineering
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This paper focuses on the problems that arise when integrating data from heterogeneous sources in a single, unified database view. At first, we give a detailed analysis of the kinds of structural heterogeneity that occur when unified views are derived from different database systems. We present the results in a multiple tier architecture which distinguishes different levels of heterogeneity and relates them to their underlying causes as well as to the mapping conflicts resulting from the view derivation process. As the second essential contribution, the paper presents our approach to a mapping language solving the identified conflicts. The main characteristics of the language are its descriptiveness, its capability to map between schemas written in the relational, object-oriented, ER, or EXPRESS data model, and its facilities for specifying user-defined update operations on the view that are to be propagated to the data sources. Finally, we briefly discuss how this mapping information is employed to convert queries formulated with respect to the integrated view, into database operations over the heterogeneous data sources.