This book constitutes the refereed proceedings of the 17th International Semantic Web Conference, ESWC 2020, held in Heraklion, Crete, Greece.*

Ontologies and Reasoning.- Handling Impossible Derivations during Stream Reasoning.- Modular Graphical Ontology Engineering Evaluated.- Fast and Exact Rule Mining with AMIE 3.- A Simple Method for Inducing Class Taxonomies in Knowledge Graphs.- Hybrid Reasoning over Large Knowledge Bases Using On-The-Fly Knowledge Extraction.- Natural Language Processing and Information Retrieval.- Partial Domain Adaptation for Relation Extraction Based on Adversarial Learning.- SASOBUS: Semi-automatic Sentiment Domain Ontology Building Using Synsets.- Keyword Search over RDF Using Document-centric Information Retrieval Systems.- Entity Linking and Lexico-Semantic Patterns for Ontology Learning.- Semantic Data Management and Data Infrastructures.- Estimating Characteristic Sets for RDF Dataset Profiles Based on Sampling.- Social and Human Aspects of the Semantic Web.- SchemaTree: Maximum-likelihood Property Recommendation for Wikidata.- Machine Learning.- Hyperbolic Knowledge Graph Embeddings for Knowledge Base Completion.- Unsupervised Bootstrapping of Active Learning for Entity Resolution.- Distribution and Decentralization.- Processing SPARQL Aggregates Queries with Web Preemption.- Science of Science.- Embedding-based Recommendations on Scholarly Knowledge Graphs.- Investigating Software Usage in the Social Sciences: A Knowledge Graph Approach.- Fostering Scientific Meta-Analyses with Knowledge Graphs: a Case Study.- Security, Privacy, Licensing and Trust.- SAShA: Semantic-Aware Shilling Attacks on Recommender Systems Exploiting Knowledge Graphs.- Knowledge Graphs.- Entity Extraction from Wikipedia List Pages.- The Knowledge Graph Track at OAEI - Gold Standards, Baselines, and the Golden Hammer Bias.- Detecting Synonymous Properties by Shared Data-driven Definitions.- Entity Summarization with User Feedback.- Incremental Multi-source Entity Resolution for Knowledge Graph Completion.- Building Linked Spatio-Temporal Data from Vectorized Historical Maps.- Integration, Services and APIs.- QAnswer KG: Creating On-Demand Question Answering Systems on Top of RDF Data.- Equivalent Rewritings on Path Views with Binding Patterns.- Resources.- A Knowledge Graph for Industry 4.0.- MetaLink: A Travel Guide to the LOD Cloud.- Astrea: Automatic Generation of SHACL Shapes from Ontologies.- SemTab 2019: Resources to Benchmark Tabular Data to Knowledge Graph Matching Systems.- VQuAnDa: Verbalization QUestion ANswering DAtaset.- ESBM: An Entity Summarization BenchMark.- GEval: a Modular and Extensible Evaluation Framework for Graph Embedding Techniques.- YAGO 4: A Reason-able Knowledge Base.- In-Use.- On Modeling the Physical World as a Collection of Things: the W3C Thing Description Ontology.- Applying Knowledge Graphs as Integrated Semantic Information Model for the Computerized Engineering of Building Automation Systems.- Supporting Complex Decision Making by Semantic Technologies.- Piveau: A Large-scale Open Data Management Platform Based on Semantic Web Technologies.- StreamPipes Connect: Semantics-Based Edge Adapters for the Industrial IoT.