SPARQL

SPARQL (pronounced "sparkle", acronym for SPARQL Protocol And RDF Query Language) is an RDF query language, that is, a semantic query language for databases. With SPARQL you can extract any kind of data, with a query composed of logical combinations of triples. Wikidata provides an SPARQL endpoint including a powerful Web-GUI since September 2015. This book focuses on the Wikidata database, with lots of examples. Other SPARQL endpoints include QLever and Sophox, which uses the same GUI as Wikidata SPARQL Service for OpenStreetMap and Wikidata.https://wiki.openstreetmap.org/wiki/Sophox Introduction thumb|right|Querying Wikidata with SPARQL for Absolute Beginners /Basics/ /Wikidata Query Service/ Introduction /Prefixes/ /Sentences/ /Triples/ SPARQL Statements /SELECT/ /OPTIONAL/ Filtering: FILTER, FILTER NOT EXIST and MINUS /UNION/ SERVICEs SERVICE Labels and Descriptions SERVICE around and box SERVICE Mediawiki Api (Wikipedia, commons etc.) /Modifiers/ like GROUP BY, HAVING, ORDER BY, LIMIT /Aggregate functions/ COUNT, MIN, MAX, SUM, AVG, SAMPLE and GROUP_CONCAT /Bad aggregate/ error Advanced SPARQL topics /Property paths/ and Instances and classes /Variables/ /Expressions and Functions/ /Federated query/ /Subqueries/ /Templates/ WIKIDATA data representation /WIKIDATA Qualifiers, References and Ranks/ /WIKIDATA Language links and Badges/ /WIKIDATA Precision, Units and Coordinates/ /WIKIDATA Lexicographical data/ /Wikimedia Commons Query Service/ Miscellaneous /Views/ /FAQ/ References Computer programming languages S 75% __NOTOC__ __NOEDITSECTION__