Logical foundations of object-oriented and frame-based languages
Journal of the ACM (JACM)
Using schematically heterogeneous structures
SIGMOD '98 Proceedings of the 1998 ACM SIGMOD international conference on Management of data
Resolution of representational diversity in multidatabase systems
Management of heterogeneous and autonomous database systems
On wrapping query languages and efficient XML integration
SIGMOD '00 Proceedings of the 2000 ACM SIGMOD international conference on Management of data
A vision for management of complex models
ACM SIGMOD Record
RQL: a declarative query language for RDF
Proceedings of the 11th international conference on World Wide Web
Principles of Database and Knowledge-Base Systems: Volume II: The New Technologies
Principles of Database and Knowledge-Base Systems: Volume II: The New Technologies
Data integration: a theoretical perspective
Proceedings of the twenty-first ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
Foundations of Databases: The Logical Level
Foundations of Databases: The Logical Level
Management of Multiple Models in an Extensible Database Design Tool
EDBT '96 Proceedings of the 5th International Conference on Extending Database Technology: Advances in Database Technology
WOL: A Language for Database Transformations and Constraints
ICDE '97 Proceedings of the Thirteenth International Conference on Data Engineering
Correspondence and Translation for Heterogeneous Data
ICDT '97 Proceedings of the 6th International Conference on Database Theory
SchemaSQL - A Language for Interoperability in Relational Multi-Database Systems
VLDB '96 Proceedings of the 22th International Conference on Very Large Data Bases
Schema Translation between Heterogeneous Data Models in a Lattice Framework
DS-6 Proceedings of the Sixth IFIP TC-2 Working Conference on Data Semantics: Database Applications Semantics
M(DM): An Open Framework for Interoperation of Multimodel Multidatabase Systems
Proceedings of the Eighth International Conference on Data Engineering
A survey of approaches to automatic schema matching
The VLDB Journal — The International Journal on Very Large Data Bases
The uni-level description: a uniform framework for managing structural heterogeneity
The uni-level description: a uniform framework for managing structural heterogeneity
ModelGen: Model Independent Schema Translation
ICDE '05 Proceedings of the 21st International Conference on Data Engineering
Composing schema mappings: second-order dependencies to the rescue
PODS '04 Proceedings of the twenty-third ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
Supporting executable mappings in model management
Proceedings of the 2005 ACM SIGMOD international conference on Management of data
VLDB '02 Proceedings of the 28th international conference on Very Large Data Bases
An object-oriented operation-based approach to translation between MOF metaschemas
Data & Knowledge Engineering
Modeling data warehouse schema evolution over extended hierarchy semantics
Journal on Data Semantics XIII
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We describe a framework called the Uni-Level Description (ULD) for accurately representing information from a broad range of data models. The ULD extends previous meta-data-model approaches by: (a) providing uniform representation and access to data model, schema, and data, and (b) supporting data models with non-traditional schema arrangements, including those that allow optional and multiple levels of schema. Because the ULD is a flat, first-order representation, we show how Datalog over the ULD can provide a flexible mechanism to query, extract, and transform reformation from data sources that exhibit various types of structural heterogeneity.