Foundations of ontology-based data access under bag semantics
Ontology-based data access (OBDA) is a popular approach for integrating and querying multiple data sources by means of a shared ontology. The ontology is linked to the sources using mappings, which assign to ontology predicates views over the data. The conventional semantics of OBDA is set-based—tha...
| Main Authors: | , , , , , |
|---|---|
| 格式: | Journal article |
| 出版: |
Elsevier
2019
|