Fig. 1From: An ontology-guided semantic data integration framework to support integrative data analysis of cancer survivalThe 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 sourcesBack to article page