@techreport{CARRE:D.4.2, AUTHOR = {George Drosatos and George Gkotsis and Enjie Liu and Nick Portokalidis and Allan Third}, title = {D.4.2. Schema Mapping \& Metadata Enrichment}, institution = {CARRE Project (\url{https://www.carre-project.eu}), European Union 7th Framework Programme}, MONTH = {Apr.}, YEAR = {2015}, pages={1-79}, url = {https://www.carre-project.eu/download/public_files/CARRE_D.4.2_SemanticEnrichment.pdf}, NOTE = {[EC accepted]} }