Antoine Zimmermann – författare

This book provides a comprehensive and accessible introduction to knowledge graphs, which have recently garnered notable attention from both industry and academia.

This book provides a comprehensive and accessible introduction to knowledge graphs, which have recently garnered notable attention from both industry and academia. Knowledge graphs are founded on the principle of applying a graph-based abstraction to data, and are now broadly deployed in scenarios that require integrating and extracting value from multiple, diverse sources of data at large scale. The book defines knowledge graphs and provides a high-level overview of how they are used. It presents and contrasts popular graph models that are commonly used to represent data as graphs, and the languages by which they can be queried before describing how the resulting data graph can be enhanced with notions of schema, identity, and context. The book discusses how ontologies and rules can be used to encode knowledge as well as how inductive techniques—based on statistics, graph analytics, machine learning, etc.—can be used to encode and extract knowledge. It covers techniques for the creation, enrichment, assessment, and refinement of knowledge graphs and surveys recent open and enterprise knowledge graphs and the industries or applications within which they have been most widely adopted. The book closes by discussing the current limitations and future directions along which knowledge graphs are likely to evolve. This book is aimed at students, researchers, and practitioners who wish to learn more about knowledge graphs and how they facilitate extracting value from diverse data at large scale. To make the book accessible for newcomers, running examples and graphical notation are used throughout. Formal definitions and extensive references are also provided for those who opt to delve more deeply into specific topics.

This book constitutes the refereed proceedings of the 12th Extended Semantic Web Conference, ESWC 2014, held in Anissaras, Portoroz, Slovenia, in May/June 2015. The 43 revised full papers presented together with three invited talks were carefully reviewed and selected from 164 submissions. This program was completed by a demonstration and poster session, in which researchers had the chance to present their latest results and advances in the form of live demos. In addition, the PhD Symposium program included 12 contributions, selected out of 16 submissions. The core tracks of the research conference were complemented with new tracks focusing on linking machine and human computation at web scale (cognition and Semantic Web, Human Computation and Crowdsourcing) beside the following subjects Vocabularies, Schemas, Ontologies, Reasoning, Linked Data, Semantic Web and Web Science, Semantic Data Management, Big data, Scalability, Natural Language Processing and Information Retrieval, Machine Learning, Mobile Web, Internet of Things and Semantic Streams, Services, Web APIs and the Web of Things, Cognition and Semantic Web, Human Computation and Crowdsourcing and In-Use Industrial Track as well.

This book constitutes the refereed proceedings of the 12th Extended Semantic Web Conference, ESWC 2014, held in Anissaras, Portoroz, Slovenia, in May/June 2015. The 43 revised full papers presented together with three invited talks were carefully reviewed and selected from 164 submissions. This program was completed by a demonstration and poster session, in which researchers had the chance to present their latest results and advances in the form of live demos. In addition, the PhD Symposium program included 12 contributions, selected out of 16 submissions. The core tracks of the research conference were complemented with new tracks focusing on linking machine and human computation at web scale (cognition and Semantic Web, Human Computation and Crowdsourcing) beside the following subjects Vocabularies, Schemas, Ontologies, Reasoning, Linked Data, Semantic Web and Web Science, Semantic Data Management, Big data, Scalability, Natural Language Processing and Information Retrieval, Machine Learning, Mobile Web, Internet of Things and Semantic Streams, Services, Web APIs and the Web of Things, Cognition and Semantic Web, Human Computation and Crowdsourcing and In-Use Industrial Track as well.

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 Portorož,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).

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 Portorož,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).

The volume contains 12poster and 22 demonstration papers, selected from 50 submissions, as well as 22best workshop papers selected from 140 papers presented at the 16 workshopsthat took place at ESWC 2015.