Querying XML data with SPARQL Querying XML data with SPARQL Πλήρης Δημοσίευση σε Συνέδριο Conference Full Paper 2015-10-042009enSPARQL is today the standard access language for Semantic Web data. In the recent years XML databases have also acquired industrial importance due to the widespread applicability of XML in the Web. In this paper we present a framework that bridges the heterogeneity gap and creates an interoperable environment where SPARQL queries are used to access XML databases. Our approach assumes that fairly generic mappings between ontology constructs and XML Schema constructs have been automatically derived or manually specified. The mappings are used to automatically translate SPARQL queries to semantically equivalent XQuery queries which are used to access the XML databases. We present the algorithms and the implementation of SPARQL2XQuery framework, which is used for answering SPARQL queries over XML databases.http://creativecommons.org/licenses/by/4.0/372-381 In the proceedings of the 20th International Conference on Database and Expert Systems Applications DEXA Christodoulakis Stavros Χριστοδουλακης Σταυρος Nikos Bikakis Nektarios Gioldasis Chrisa Tsinaraki Springer Verlag Mapping OWL to XML Schema The Query Translation Process