Semantic Systems. In the Era of Knowledge Graphs 16th International Conference on Semantic Systems, SEMANTiCS 2020, Amsterdam, The Netherlands, September 7{u2013}10, 2020, Proceedings

This open access book constitutes the refereed proceedings of the 16th International Conference on Semantic Systems, SEMANTiCS 2020, held in Amsterdam, The Netherlands, in September 2020. The conference was held virtually due to the COVID-19 pandemic. Preface 6 Organization 8 Contents 14 The New DBpedia Release Cycle: Increasing Agility and Efficiency in Knowledge Extraction Workflows 15 1 Introduction 15 2 Background and Motivation 16 3 DBpedia Release Cycle Overview 17 4 Conceptual Design Principles 19 4.1 Time-Driven vs. Quality-Driven Data Releases 19 4.2 Traceability and Issue Management 20 5 Testing Methodology 22 5.1 Construct Validation 22 5.2 Syntactical Validation 24 5.3 Shape Validation 24 5.4 Integration Validation 25 6 Experimental Evaluation 25 7 Related Work 29 8 Conclusion and Future Work 30 References 31 DBpedia Archivo: A Web-Scale Interface for Ontology Archiving Under Consumer-Oriented Aspects 33 1 Introduction 33 2 Related Work 35 2.1 Archiving and Versioning 36 2.2 Ontology Repositories and Platforms 36 2.3 Ontology Evaluation and Validation 37 3 Archivo Platform Model 38 3.1 Versioning and Persistence on the Databus 38 3.2 Evaluation Plugins and SHACL Library 38 3.3 Feature Plugins 39 4 Archivo Implementation 39 4.1 Ontology Discovery and Indexing 40 4.2 Analysis, Plugins and Release 41 4.3 Versioning and Persistence 42 5 A Consumer-Oriented Ontology Star Rating 43 5.1 Two Star Baseline 43 5.2 Quality Stars 43 5.3 Further Stars and Ratings 44 6 Evaluation 45 6.1 Archivo and Rating Statistics 45 6.2 System Comparison 45 7 Future Work 47 References 47 A Knowledge Retrieval Framework for Household Objects and Actions with External Knowledge 50 1 Introduction 50 2 Related Work 51 3 Our Approach 53 3.1 Household Dataset 53 3.2 Ontology 54 3.3 Semantic Matching Algorithm 56 4 Evaluation 59 5 Discussion and Conclusion 62 References 63 Semantic Annotation, Representation and Linking of Survey Data 67 1 Introduction 67 2 Related Work 69 3 Semantic Features of Survey Questions 70 3.1 Survey Questions 70 3.2 A Taxonomy of Question Features 71 3.3 Data Model and Vocabulary 73 4 Annotation and Enrichment 74 4.1 Manual Annotation 74 4.2 Automatic Prediction 75 4.3 Evaluation Setup 77 4.4 Results 77 5 Conclusion 80 References 81 QueDI: From Knowledge Graph Querying to Data Visualization 84 1 Introduction 84 2 Related Work 86 3 QueDI: A Guided Approach to Query and Exploit LOD 88 3.1 Linked Open Data Querying Challenges 88 3.2 QueDI Overview 89 3.3 Navigation Scenario on DBpedia 93 4 Evaluation 93 4.1 Accuracy, Expressivity and Scalability over QALD-9 93 4.2 Usability 96 5 Conclusion and Future Work 98 References 99 EcoDaLo: Federating Advertisement Targeting with Linked Data 101 1 Introduction 101 2 EcoDaLo 103 3 Federating Advertisement Targeting with Linked Data 104 3.1 High-Level Overview: Federated Querying with Common Identifier 106 3.2 Example of Federated Querying with Common Identifier 106 3.3 Design Considerations 106 4 Deployment 108 4.1 EcoDaLo Ad Server 108 4.2 Common Trait Model 108 4.3 Mapping to the Common Trait Model 109 4.4 Federated Querying Layer 110 4.5 Developer-Friendly API 110 5 Validation 111 5.1 Launched Campaign 111 5.2 Functional Comparison 111 6 Related Work 112 7 Conclusion 113 7.1 Privacy and Ethical Considerations 113 7.2 Key Features of Our Approach 114 7.3 Future Work 114 References 115 MINDS: A Translator to Embed Mathematical Expressions Inside SPARQL Queries 118 1 Introduction 118 2 Related Work 119 3 Motivating Example 120 4 MINDS: From a Math Formula to SPARQL Bindings 122 5 Precision Results 125 6 Use Cases 128 7 Conclusion 129 References 130 Integrating Historical Person Registers as Linked Open Data in the WarSampo Knowledge Graph 132 1 Introduction 132 2 Data: WarSampo Person Registers 133 3 Method: Linking Person Records 134 4 Results and Evaluation 136 5 Discussion 138 References 139 Author Index 141 Front Matter ....Pages i-xiii The New DBpedia Release Cycle: Increasing Agility and Efficiency in Knowledge Extraction Workflows (Marvin Hofer, Sebastian Hellmann, Milan Dojchinovski, Johannes Frey)....Pages 1-18 DBpedia Archivo: A Web-Scale Interface for Ontology Archiving Under Consumer-Oriented Aspects (Johannes Frey, Denis Streitmatter, Fabian Götz, Sebastian Hellmann, Natanael Arndt)....Pages 19-35 A Knowledge Retrieval Framework for Household Objects and Actions with External Knowledge (Alexandros Vassiliades, Nick Bassiliades, Filippos Gouidis, Theodore Patkos)....Pages 36-52 Semantic Annotation, Representation and Linking of Survey Data (Felix Bensmann, Andrea Papenmeier, Dagmar Kern, Benjamin Zapilko, Stefan Dietze)....Pages 53-69 QueDI: From Knowledge Graph Querying to Data Visualization (Renato De Donato, Martina Garofalo, Delfina Malandrino, Maria Angela Pellegrino, Andrea Petta, Vittorio Scarano)....Pages 70-86 EcoDaLo: Federating Advertisement Targeting with Linked Data (Sven Lieber, Ben De Meester, Ruben Verborgh, Anastasia Dimou)....Pages 87-103 MINDS: A Translator to Embed Mathematical Expressions Inside SPARQL Queries (Damien Graux, Gezim Sejdiu, Claus Stadler, Giulio Napolitano, Jens Lehmann)....Pages 104-117 Integrating Historical Person Registers as Linked Open Data in the WarSampo Knowledge Graph (Mikko Koho, Petri Leskinen, Eero Hyvönen)....Pages 118-126 Back Matter ....Pages 127-127 This open access book constitutes the refereed proceedings of the 17th International Conference on Semantic Systems, SEMANTiCS 2020, held in Amsterdam, The Netherlands, in September 2020