id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
work_bddby6hpkbcbhepqogem6gmexi	Giuseppe Fusco	An approach for semantic integration of heterogeneous data sources	2020	30	.pdf	application/pdf	10684	1185	60	distributed among heterogeneous information sources, which can be structured, semistructured or unstructured, and providing the user with a unified view of these data. as a conceptual schema to represent both data sources to be integrated and the global The second issue is how to define mappings between global schema and local sources: Once the query processing activity is performed, data from different sources need to be data integration from heterogeneous sources, also based on ontologies (Calvanese, Lembo external data management systems through semantic mappings that associate SQL queries in the previous activity, is integrated into the global ontology and the mapping table is Local and global ontologies are expressed in OWL-DL (https://www.w3.org/TR/owlfeatures/), whose basic elements are classes c, object properties op and datatype properties The goal of schema matching activity is to generate a set of mapping between local and Query processing for XML data source is supported by a framework, integrated	./cache/work_bddby6hpkbcbhepqogem6gmexi.pdf	./txt/work_bddby6hpkbcbhepqogem6gmexi.txt