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Fig. 1 | BMC Medical Informatics and Decision Making

Fig. 1

From: An ontology-guided semantic data integration framework to support integrative data analysis of cancer survival

Fig. 1

The overall process of our semantic data integration approach through an ontology-based data access framework. *The user can post data integration requests according to OCRV, then the requests were converted into SPARQL queries through the data integration pipeline. The OBDA model consists of a set of semantic mappings that specify how source data are related to the entities in the ontology. The Quest is a SPARQL query engine which uses the semantic mappings in the OBDA model to translate SPARQL queries over the ontology into SQL queries over the data sources

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