- Nov 2023
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ontobee.org ontobee.orgOntobee1
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ontobee.org ontobee.orgOntobee1
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schema.org schema.org
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schema.org schema.org
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web.resource.org web.resource.org
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asistdl.onlinelibrary.wiley.com asistdl.onlinelibrary.wiley.com
- Oct 2023
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hbz.github.io hbz.github.io
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cran.r-project.org cran.r-project.org
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github.com github.com
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docs.atomicdata.dev docs.atomicdata.dev
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perso.liris.cnrs.fr perso.liris.cnrs.fr
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w3c.github.io w3c.github.io
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rdf.insee.fr rdf.insee.fr
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www.dnb.de www.dnb.de
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www.w3.org www.w3.org
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www.w3.org www.w3.org
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www.learningsparql.com www.learningsparql.com
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docs.data.world docs.data.world
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data.world data.world
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data.bnf.fr data.bnf.fr
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levelup.gitconnected.com levelup.gitconnected.com
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www.w3.org www.w3.org
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ontopia.net ontopia.net
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www.w3.org www.w3.org
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jena.apache.org jena.apache.org
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networkedplanet.com networkedplanet.com
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www.w3.org www.w3.org
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w3c.github.io w3c.github.io
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www.slideshare.net www.slideshare.net
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cambridgesemantics.com cambridgesemantics.com
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cambridgesemantics.com cambridgesemantics.com
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Federated SPARQL Query, incorporating data from both DBpedia & Wikidata
```sparql PREFIX wd: http://www.wikidata.org/entity/ PREFIX wdt: http://www.wikidata.org/prop/direct/ PREFIX wikibase: http://wikiba.se/ontology# PREFIX p: http://www.wikidata.org/prop/ PREFIX ps: http://www.wikidata.org/prop/statement/ PREFIX pq: http://www.wikidata.org/prop/qualifier/ PREFIX bd: http://www.bigdata.com/rdf# PREFIX owl: http://www.w3.org/2002/07/owl# PREFIX rdfs: http://www.w3.org/2000/01/rdf-schema# PREFIX foaf: http://xmlns.com/foaf/0.1/ PREFIX dct: http://purl.org/dc/terms/SELECT DISTINCT ?dbpediaID AS ?href xsd:string(?label) AS ?name ?description ?subjectText ?item AS ?wikidataID ?dbpediaID ?image ?picture WHERE { SERVICE http://query.wikidata.org/sparql { SELECT DISTINCT ?item ?itemLabel ?numero ( SAMPLE(?pic) AS ?picture ) WHERE { ?item p:P528 ?catalogStatement . ?catalogStatement ps:P528 ?numero . ?catalogStatement pq:P972 wd:Q14530 . OPTIONAL { ?item wdt:P18 ?pic } . SERVICE wikibase:label { bd:serviceParam wikibase:language "en" } } GROUP BY ?item ?itemLabel ?numero ORDER BY ?numero }
SERVICE <http://dbpedia.org/sparql> { SELECT ?item ?dbpediaID ?label ?image ?description ?subjectText FROM <http://dbpedia.org> WHERE { ?dbpediaID owl:sameAs ?item ; rdfs:label ?label ; foaf:depiction ?image ; rdfs:comment ?description ; dct:subject [ rdfs:label ?subjectText ] . FILTER ( LANG(?label) = "en" ) FILTER ( LANG(?description) = "en" ) } }
} ```
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meta.wikimedia.org meta.wikimedia.org
- Sep 2023
- Aug 2023
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direct.mit.edu direct.mit.edu
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cso.kmi.open.ac.uk cso.kmi.open.ac.uk
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www.bbc.co.uk www.bbc.co.uk
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thes.bncf.firenze.sbn.it thes.bncf.firenze.sbn.it
- Jul 2023
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cv.iptc.org cv.iptc.org
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xmlns.com xmlns.com
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enterprise-knowledge.com enterprise-knowledge.com
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w3c.github.io w3c.github.io
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RDF-star: bridging the gap betweenLinked Data and Property Graphs
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w3c.github.io w3c.github.io
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www.youtube.com www.youtube.com
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news.ycombinator.com news.ycombinator.com
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www.datasciencecentral.com www.datasciencecentral.com
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www.ontotext.com www.ontotext.com
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w3c.github.io w3c.github.io
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- Jun 2023
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wdtaxonomy.readthedocs.io wdtaxonomy.readthedocs.io
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mapping-commons.github.io mapping-commons.github.io
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mapping-commons.github.io mapping-commons.github.io
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nomisma.org nomisma.org
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hal.archives-ouvertes.fr hal.archives-ouvertes.fr
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campus.dariah.eu campus.dariah.eu
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There are many different types of controlled vocabularies, the most common among them are: Thesaurus - a type of controlled vocabulary used in information systems that organizes concepts in hierarchical and/or associative relationships and provides their semantic definitions Classification schema - a system that based primarily on classifying things or concepts into groups or classes with a detailed explanation of those classification methods Subject heading list - a list of terms describing subjects in information system Taxonomy - a system that organizes things and concepts in groups based on their common characteristics and/or differences Terminology - a list of terms used to describe concepts in a certain domain Glossary - an alphabetical list of terms with their explanation used in a specific context
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www.cs.vu.nl www.cs.vu.nl
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publications-prairial.fr publications-prairial.fr
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archinfo24.hypotheses.org archinfo24.hypotheses.org
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schema.org schema.org
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schema.org schema.org
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id.loc.gov id.loc.gov
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id.loc.gov id.loc.gov
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jakobib.github.io jakobib.github.io
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link.springer.com link.springer.com
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vocabulary.mimo-international.com vocabulary.mimo-international.com
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vocabulary.mimo-international.com vocabulary.mimo-international.com
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www.wikidata.org www.wikidata.org
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ceur-ws.org ceur-ws.org
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lim.univ-reunion.fr lim.univ-reunion.fr
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www.dataversity.net www.dataversity.net
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ontosql.inria.fr ontosql.inria.fr
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cambridgesemantics.com cambridgesemantics.com
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arxiv.org arxiv.org
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sage.univ-nantes.fr sage.univ-nantes.frSaGe1
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webmasters.stackexchange.com webmasters.stackexchange.com
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sameas.org sameas.orgsameAs1
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github.com github.com
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andreapoltronieri.org andreapoltronieri.org
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blog.wolfram.com blog.wolfram.com
- May 2023
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graphdb.ontotext.com graphdb.ontotext.com
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graphdb.ontotext.com graphdb.ontotext.com
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For example, when merging four different datasets, you can use the following query on DBpedia to select everything about Sofia:
sparql SELECT * { { <http://dbpedia.org/resource/Sofia> ?p ?o . } UNION { <http://data.nytimes.com/nytimes:N82091399958465550531> ?p ?o . } UNION { <http://sws.geonames.org/727011/> ?p ?o . } UNION { <http://rdf.freebase.com/ns/m/0ftjx> ?p ?o . } }
sparql SELECT * { ?s ?p ?o FILTER (?s IN ( <http://dbpedia.org/resource/Sofia>, <http://data.nytimes.com/nytimes:N82091399958465550531>, <http://sws.geonames.org/727011/>, <http://rdf.freebase.com/ns/m/0ftjx>)) }
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www.w3.org www.w3.org
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accidental-taxonomist.blogspot.com accidental-taxonomist.blogspot.com
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github.com github.com
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```php
$record) { if ($name<>"count" and $name<>"specials") { foreach ($record["site"] as $sitelink) { $site[$sitelink["dbname"]]=$sitelink["url"]; } } if ($name==="specials") { foreach ($record as $sitelink) { $site[$sitelink["dbname"]]=$sitelink["url"]; } } } /* Open files */ $fp = fopen('data/'.$entity_proc.'.ttl', 'w'); fwrite($fp, "@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .\n"); fwrite($fp, "@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .\n"); fwrite($fp, "@prefix skos: <http://www.w3.org/2004/02/skos/core#> .\n"); fwrite($fp, "@prefix wd: <http://www.wikidata.org/entity/> .\n"); fwrite($fp, "@prefix wdt: <http://www.wikidata.org/prop/direct/> .\n"); fwrite($fp,"\n"); fwrite($fp,"<http://www.wikidata.org/categories> rdf:type skos:ConceptScheme ;\n"); fwrite($fp," skos:prefLabel \"Wikidata categories\"@en .\n\n"); // echo $list_entities."\n"; $url = "https://www.wikidata.org/w/api.php?action=wbgetentities&ids=".$entity_proc."&props=labels|aliases|sitelinks&format=php&utf8="; $a = unserialize(file_get_contents($url)); foreach ($a["entities"] as $entity=>$data_entity) { fwrite($fp,"wd:".$entity." rdf:type skos:Concept ;\n"); fwrite($fp," skos:inScheme <http://www.wikidata.org/categories> "); if (isset($data_entity["labels"])) { foreach ($data_entity["labels"] as $label) { fwrite($fp,";\n skos:prefLabel \"".$label["value"]."\"@".$label["language"]." "); } } if (isset($data_entity["aliases"])) { foreach ($data_entity["aliases"] as $item) { foreach ($item as $label) { fwrite($fp,";\n skos:altLabel> \"".$label["value"]."\"@".$label["language"]." "); } } } foreach ($data_entity["sitelinks"] as $item) { if (in_array($item["site"],$array_sources)) { /* GET BROADER CATEGORIES */ $repeat_query=true; $cmcontinue=""; while ($repeat_query==true) { $repeat_query = false; $url_wiki = $site[$item["site"]]."/w/api.php?action=query&generator=categories&titles=".urlencode($item["title"])."&prop=pageprops|categoryinfo&format=php&utf8=".$cmcontinue; $b = unserialize(file_get_contents($url_wiki)); if (isset($b["continue"]["cmcontinue"])) { $repeat_query = true; $cmcontinue = $b["continue"]["cmcontinue"]; } if (isset($b["query"]["pages"])) { foreach ($b["query"]["pages"] as $broadcat) { if (isset($broadcat["pageprops"]["wikibase_item"])) { if (!isset($broader[$broadcat["pageprops"]["wikibase_item"]])) {$broader[$broadcat["pageprops"]["wikibase_item"]]=$broadcat["title"];} // fwrite($fp,"<http://www.wikidata.org/entity/".$entity_proc."> <http://www.w3.org/2004/02/skos/core#broader> <http://www.wikidata.org/entity/".$broadcat["pageprops"]["wikibase_item"]."> <http://www.wikidata.org/categories/".$item["site"]."> .\n"); } } } } /* GET NARROWER CATEGORIES */ $repeat_query=true; $cmcontinue=""; while ($repeat_query==true) { $repeat_query = false; $url_wiki = $site[$item["site"]]."/w/api.php?action=query&generator=categorymembers&gcmtitle=".urlencode($item["title"])."&gcmtype=subcat&prop=pageprops|categoryinfo&format=php&utf8=".$cmcontinue; $b = unserialize(file_get_contents($url_wiki)); if (isset($b["continue"]["cmcontinue"])) { $repeat_query = true; $cmcontinue = $b["continue"]["cmcontinue"]; } if (isset($b["query"]["pages"])) { foreach ($b["query"]["pages"] as $narrowcat) { if (isset($narrowcat["pageprops"]["wikibase_item"])) { if (!isset($narrower[$narrowcat["pageprops"]["wikibase_item"]]) or $item["site"]=="enwiki") {$narrower[$narrowcat["pageprops"]["wikibase_item"]]=$narrowcat["title"];} // fwrite($fp,"<http://www.wikidata.org/entity/".$entity_proc."> <http://www.w3.org/2004/02/skos/core#narrower> <http://www.wikidata.org/entity/".$narrowcat["pageprops"]["wikibase_item"]."> <http://www.wikidata.org/categories/".$item["site"]."> .\n"); } } } } } } } $prevalue=""; foreach ($broader as $target=>$value) { fwrite($fp,";".$prevalue."\n skos:broader wd:".$target); $prevalue=" # ".$value; } if ($prevalue!=="") {fwrite($fp,$prevalue);} $prevalue=""; foreach ($narrower as $target=>$value) { fwrite($fp,";".$prevalue."\n skos:narrower wd:".$target); $prevalue=" # ".$value; } if ($prevalue!=="") {fwrite($fp,$prevalue);} fwrite($fp,".\n\n"); fclose($fp); ?>```
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