Thisbook constitutes the thoroughly refereed proceedings of the 5th JointInternational Semantic Technology Conference, JIST 2015, held in Yichang,China, in November 2015.The theme of the JIST 2015 conference was "e;Big Data andSocial Media"e;. The JIST 2015 conference consisted of main technical tracksincluding 2 keynotes, 2 invited talks, a regular technical paper track (fulland short papers), an in-use track, a poster and demo session, workshop, andtutorial.The 14 full and 8 short papers in this volume were carefullyreviewed and selected from 43 submissions. The paper cover the followingtopics: ontology and reasoning, linked data, learning and discovery, RDF andquery, knowledge graph, knowledge integration, query and recommendation, andapplications of semantic technologies.