The two volumes LNCS 10249 and 10250 constitute the refereed proceedings of the 14th
International Semantic Web Conference ESWC 2017 held in Portoroz Slovenia. The 51 revised
full papers presented were carefully reviewed and selected from 183 submissions. In addition
10 PhD papers are included selected out of 14 submissions. The papers are organized in the
following tracks: semantic data management big data and scalability linked data machine
learning mobile web sensors and semantic streams natural language processing and
information retrieval vocabularies schemas and ontologies reasoning social web and web
science semantic web and transparency in use and industrial track and PhD symposium.