Thisbook constitutes the thoroughly refereed post conference proceedings of thesecond edition
of the Semantic Web Evaluation Challenge SemWebEval 2015 co-located with the 12th European
Semantic Web conference held in Portoroz Slovenia in May June 2015. This book includes
thedescriptions of all methods and tools that competed at SemWebEval 2015 together with a
detailed description of the tasks evaluation procedures anddatasets. The contributions are
grouped in the areas: open knowledge extractionchallenge (OKE 2015) semantic publishing
challenge (SemPub 2015) schema-agnostic queries over large-schema databases challenge (SAQ
2015) concept-level sentiment analysis challenge (CLSA 2015).
