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2 results for “yago”
YAGO knowledge base
<p>YAGO is a knowledge base, i.e., a database with knowledge about the real world. YAGO contains both entities (such as movies, people, cities, countries, etc.) and relations between these entities (who played in which movie, which city is located in which country, etc.). All in all, YAGO contains more than 50 million entities and 2 billion facts.</p> <p>YAGO arranges its entities into classes: Elvis Presley belongs to the class of people, Paris belongs to the class of cities, and so on. These classes are arranged in a taxonomy: The class of cities is a subclass of the class of populated places, this class is a subclass of geographical locations, etc.</p> <p>YAGO also defines which relations can hold between which entities: birthPlace, e.g., is a relation that can hold between a person and a place. The definition of these relations, together with the taxonomy is called the ontology.</p> <p>For more information, see https://yago-knowledge.org</p> <p> </p>
Automatically Extracted SHACL Shapes for WikiData, DBpedia, YAGO-4, and LUBM & Associated Coverage Statistics
<p>The uploaded datasets contain <strong>automatically extracted </strong>SHACL shapes for the following datasets:</p> <ul> <li>WikiData (the truthy dump from September 2021 filtered by removing non-English strings) [1]</li> <li>DBpedia [2]</li> <li>YAGO-4 [3] </li> <li>LUBM (scale factor 500) [4]</li> </ul> <p>The validating shapes for these datasets are generated by a program that parses the corresponding RDF files (in `.nt` format). The extracted shapes encode various SHACL constraints, e.g., sh:minCount, sh:path, sh:class, sh:datatype etc. For each shape we encode coverage in terms of number of entities satisfying such shape, this information is encoded using the <a href="http://vocab.deri.ie/void#entities">void:entities</a> predicate. </p> <p>We have provided as executable Jar file the program we developed to extract these SHACL shapes.<br> More details about the datasets used to extract these shapes and <em>how to run the Jar</em> are available on our GitHub repository <a href="https://github.com/dkw-aau/qse">https://github.com/dkw-aau/qse</a>.</p> <p>Read more about our Quality Shapes Extraction (QSE) tool on our website <a href="https://relweb.cs.aau.dk/qse/">https://relweb.cs.aau.dk/qse/</a></p> <p>[1] Vrandečić, Denny, and Markus Krötzsch. "Wikidata: a free collaborative knowledgebase." Communications of the ACM 57.10 (2014): 78-85.</p> <p>[2] Auer, Sören, et al. "Dbpedia: A nucleus for a web of open data." The semantic web. Springer, Berlin, Heidelberg, 2007. 722-735.</p> <p>[3] Pellissier Tanon, Thomas, Gerhard Weikum, and Fabian Suchanek. "Yago 4: A reason-able knowledge base." European Semantic Web Conference. Springer, Cham, 2020.</p> <p>[4] Guo, Yuanbo, Zhengxiang Pan, and Jeff Heflin. "LUBM: A benchmark for OWL knowledge base systems." Journal of Web Semantics 3.2-3 (2005): 158-182.</p>
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