Semantic Web Evaluation Challenges: Second SemWebEval Challenge at ESWC 2015, Portorož, Slovenia, May 31 - June 4, 2015, Revised Selected Papers

This book includes the descriptions of all methods and tools that competed at SemWebEval 2015, together with a detailed description of the tasks, evaluation procedures and datasets. The contributions are grouped in the areas: open knowledge extraction challenge (OKE 2015); semantic publishing challenge (SemPub 2015); schema-agnostic queries over large-schema databases challenge (SAQ 2015); concept-level sentiment analysis challenge (CLSA 2015).