Incomplete Information in Relational Databases
Journal of the ACM (JACM)
Principles of database and knowledge-base systems, Vol. I
Principles of database and knowledge-base systems, Vol. I
Federated database systems for managing distributed, heterogeneous, and autonomous databases
ACM Computing Surveys (CSUR) - Special issue on heterogeneous databases
Journal of Logic Programming
ConceptBase—a deductive object base for meta data management
Journal of Intelligent Information Systems - Special issue: deductive and object-oriented databases
SIGMOD '85 Proceedings of the 1985 ACM SIGMOD international conference on Management of data
The logic of knowledge bases
Description logics of minimal knowledge and negation as failure
ACM Transactions on Computational Logic (TOCL)
Data integration: a theoretical perspective
Proceedings of the twenty-first ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
Logic and Data Bases
Logic and Databases: An Assessment
ICDT '90 Proceedings of the Third International Conference on Database Theory
LPAR '92 Proceedings of the International Conference on Logic Programming and Automated Reasoning
Integrity Checking in Deductive Databases
VLDB '87 Proceedings of the 13th International Conference on Very Large Data Bases
Managing Semantic Heterogeneity with Production Rules and Persistent Queues
VLDB '93 Proceedings of the 19th International Conference on Very Large Data Bases
Sesame: A Generic Architecture for Storing and Querying RDF and RDF Schema
ISWC '02 Proceedings of the First International Semantic Web Conference on The Semantic Web
The description logic handbook: theory, implementation, and applications
The description logic handbook: theory, implementation, and applications
The description logic handbook
Schema mappings, data exchange, and metadata management
Proceedings of the twenty-fourth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
Integrating Databases into the Semantic Web through an Ontology-Based Framework
ICDEW '06 Proceedings of the 22nd International Conference on Data Engineering Workshops
Ontology-based integration for relational databases
Proceedings of the 2006 ACM symposium on Applied computing
Artificial Intelligence in Medicine
Bridging the gap between OWL and relational databases
Proceedings of the 16th international conference on World Wide Web
Development of NeuroElectroMagnetic ontologies(NEMO): a framework for mining brainwave ontologies
Proceedings of the 13th ACM SIGKDD international conference on Knowledge discovery and data mining
An algorithm for the automatic transformation of ontology axioms into a rule model
CompSysTech '07 Proceedings of the 2007 international conference on Computer systems and technologies
Ontology Database: A New Method for Semantic Modeling and an Application to Brainwave Data
SSDBM '08 Proceedings of the 20th international conference on Scientific and Statistical Database Management
State of the nation in data integration for bioinformatics
Journal of Biomedical Informatics
SW-Store: a vertically partitioned DBMS for Semantic Web data management
The VLDB Journal — The International Journal on Very Large Data Bases
Scalable join processing on very large RDF graphs
Proceedings of the 2009 ACM SIGMOD International Conference on Management of data
Unification in the Description Logic $\mathcal{EL}$
RTA '09 Proceedings of the 20th International Conference on Rewriting Techniques and Applications
DL-Lite: tractable description logics for ontologies
AAAI'05 Proceedings of the 20th national conference on Artificial intelligence - Volume 2
High performance reasoning with very large knowledge bases: a practical case study
IJCAI'01 Proceedings of the 17th international joint conference on Artificial intelligence - Volume 1
Detecting Inconsistencies in the Gene Ontology Using Ontology Databases with Not-gadgets
OTM '09 Proceedings of the Confederated International Conferences, CoopIS, DOA, IS, and ODBASE 2009 on On the Move to Meaningful Internet Systems: Part II
LUBM: A benchmark for OWL knowledge base systems
Web Semantics: Science, Services and Agents on the World Wide Web
Data warehouse scenarios for model management
ER'00 Proceedings of the 19th international conference on Conceptual modeling
Discovering executable semantic mappings between ontologies
OTM'07 Proceedings of the 2007 OTM Confederated international conference on On the move to meaningful internet systems: CoopIS, DOA, ODBASE, GADA, and IS - Volume Part I
Rapid benchmarking for semantic web knowledge base systems
ISWC'05 Proceedings of the 4th international conference on The Semantic Web
Towards a complete OWL ontology benchmark
ESWC'06 Proceedings of the 3rd European conference on The Semantic Web: research and applications
A database trigger strategy to maintain knowledge bases developed via data migration
EPIA'05 Proceedings of the 12th Portuguese conference on Progress in Artificial Intelligence
Ontology translation on the semantic web
Journal on Data Semantics II
Optimize first, buy later: analyzing metrics to ramp-up very large knowledge bases
ISWC'10 Proceedings of the 9th international semantic web conference on The semantic web - Volume Part I
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An ontology database is a basic relational database management system that models an ontology plus its instances. To reason over the transitive closure of instances in the subsumption hierarchy, for example, an ontology database can either unfold views at query time or propagate assertions using triggers at load time. In this paper, we use existing benchmarks to evaluate our method--using triggers--and we demonstrate that by forward computing inferences, we not only improve query time, but the improvement appears to cost only more space (not time). However, we go on to show that the true penalties were simply opaque to the benchmark, i.e., the benchmark inadequately captures load-time costs. We have applied our methods to two case studies in biomedicine, using ontologies and data from genetics and neuroscience to illustrate two important applications: first, ontology databases answer ontology-based queries effectively; second, using triggers, ontology databases detect instance-based inconsistencies--something not possible using views. Finally, we demonstrate how to extend our methods to perform data integration across multiple, distributed ontology databases.