πŸ“• Node [[values]]
πŸ“„ VALUES.md by @sparql
  • A keyword for providing inline data, a list of values inside { }
  • [[Example]] id:: 61e6cd78-f627-493f-ae7c-04ccf880ad1a
    • #title: Notable books on linked data, semantic technologies, and semantic knowledge graphs
       
      SELECT DISTINCT ?book ?title (GROUP_CONCAT (DISTINCT ?author; SEPARATOR = ", ") AS ?authors) ?pubDate
      {
        VALUES ?book {wd:Q17744504 wd:Q17744476 wd:Q61718117 wd:Q59784970 wd:Q17744339 wd:Q51601248 wd:Q17744488 wd:Q27942623  wd:Q108378522 wd:Q110549106 wd:Q109673922 wd:Q93431614}
               
               ?book wdt:P1476 ?title.
               OPTIONAL {?book (wdt:P50/rdfs:label)|(wdt:P98/rdfs:label)|wdt:P2093 ?author
                         FILTER (LANG(?author)=""||LANG(?author)="en")}
               OPTIONAL {?book wdt:P577 ?pubDate}
      
      }
      GROUP BY ?book ?title ?pubDate
      
      #Wikidata #Query #II #OPTIONAL
  • Allows multiple variables
  • [[Syntax]]
    • #note: this is a snippet, not a valid query
      
      VALUES (?x ?y ?z) {(:URI1 "ex" 1) (:URI2 "wye" 2) (:URI3 "zed" UNDEF)}
      
      • The third list has no value for ?z, shown by the keyword UNDEF
    • () can be omitted for single values as in the example above
πŸ“„ values.md by @agora@botsin.space
πŸ“„ values.md by @an_agora@twitter.com

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