Learning Classifiers from Semantically Heterogeneous Data

Semantically heterogeneous and distributed data sources are quite common in several application domains such as bioinformatics and security informatics. In such a setting, each data source has an associated ontology. Different users or applications need to be able to query such data sources for statistics of interest (e.g., statistics needed to learn a predictive model from data). Because no single ontology meets the needs of all applications or users in every context, or for that matter, even a single user in different contexts, there is a need for principled approaches to acquiring statistics from semantically heterogeneous data. In this paper, we introduce ontology-extended data sources and define a user perspective consisting of an ontology and a set of interoperation constraints between data source ontologies and the user ontology. We show how these constraints can be used to derive mappings from source ontologies to the user ontology. We observe that most of the learning algorith...

• Type: Conference
• Year: 2004
• Where: COOPIS
• Authors: Doina Caragea, Jyotishman Pathak, Vasant Honavar
• Keywords: COOPIS 2004, Data Source, Distributed Data Sources, Information Management, User Ontology