See installing_qlever.md

...

Install luxql: https://github.com/project-lux/luxql/ And pip install -e .

python ./qleverlux/middletier.py --help

UNION and property path | expressions are equivalent in timing

SELECT (COUNT(*) AS ?count)
WHERE {
   {
      SELECT ?uri
      WHERE       {
         ?uri a lux:Item .
         {
            ?uri lux:agentOfItemBeginning <https://lux.collections.yale.edu/data/person/03ed33fa-1b1c-4fe0-9cba-614698dc94cd> .
         }
         UNION
         {
            ?uri lux:agentOfItemEncounter <https://lux.collections.yale.edu/data/person/03ed33fa-1b1c-4fe0-9cba-614698dc94cd> .
         }
         UNION
         {
            ?uri lux:agentInfluenceOfItemBeginning <https://lux.collections.yale.edu/data/person/03ed33fa-1b1c-4fe0-9cba-614698dc94cd> .
         }
      }
      GROUP BY ?uri   }
}

is the same timing as the slightly tidier but harder to generate from the LUX JSON syntax:

SELECT (COUNT(*) AS ?count)
WHERE {
   {
      SELECT ?uri
      WHERE       {
         ?uri a lux:Item ;
			lux:agentOfItemBeginning | lux:agentOfItemEncounter | lux:agentInfluenceOfItemBeginning
			<https://lux.collections.yale.edu/data/person/03ed33fa-1b1c-4fe0-9cba-614698dc94cd> .
      }
      GROUP BY ?uri   }
}

(98ms cold to count 78,322 objects, 66ms cold to generate first 100 entries)

geo_search = """ PREFIX lux: https://lux.collections.yale.edu/ns/ PREFIX ogc: http://www.opengis.net/rdf# PREFIX osmrel: https://www.openstreetmap.org/relation/ PREFIX geo: http://www.opengis.net/ont/geosparql# PREFIX osmkey: https://www.openstreetmap.org/wiki/Key: PREFIX geof: http://www.opengis.net/def/function/geosparql/ PREFIX qlss: https://qlever.cs.uni-freiburg.de/spatialSearch/

SELECT ?where ?coords WHERE { BIND( "POINT(174.763336 -36.848461)"^^geo:wktLiteral AS ?akl )

SERVICE qlss: { _:config qlss:algorithm qlss:s2 ; qlss:left ?akl ; qlss:right ?coords ; qlss:numNearestNeighbors 20 ; qlss:maxDistance 5000 ; qlss:bindDistance ?dist_left_right ; qlss:payload ?where . { ?where lux:placeDefinedBy ?coords . } } } """

geo_search2 = """ PREFIX lux: https://lux.collections.yale.edu/ns/ PREFIX ogc: http://www.opengis.net/rdf# PREFIX osmrel: https://www.openstreetmap.org/relation/ PREFIX geo: http://www.opengis.net/ont/geosparql# PREFIX osmkey: https://www.openstreetmap.org/wiki/Key: PREFIX geof: http://www.opengis.net/def/function/geosparql/ PREFIX qlss: https://qlever.cs.uni-freiburg.de/spatialSearch/ SELECT ?where ?centroid WHERE { BIND( "POINT (-1.5 53.608273)"^^geo:wktLiteral AS ?akl ) SERVICE qlss: { _:config qlss:algorithm qlss:s2 ; qlss:left ?akl ; qlss:right ?centroid ; qlss:numNearestNeighbors 10000 ; qlss:maxDistance 70000 ; qlss:bindDistance ?dist_left_right ; qlss:payload ?where, ?coords . { ?where lux:placeDefinedBy ?coords . BIND(geof:centroid(?coords) AS ?centroid) } } } """