Optimized sparql object queries.

sparql_queries

@@ -1,3 +1,21 @@
+############### filter query ###############
+PREFIX edm: <http://www.europeana.eu/schemas/edm/>
+PREFIX ore: <http://www.openarchives.org/ore/terms/>
+PREFIX dc: <http://purl.org/dc/elements/1.1/>
+PREFIX skos: <http://www.w3.org/2004/02/skos/core#>
+SELECT DISTINCT ?aggregation ?rights ?object ?view ?title ?creator
+WHERE {
+  ?object rdf:type edm:ProvidedCHO .
+  ?object dc:description ?description .
+  FILTER ( lang(?description) = "nl" && regex(?description, " oehoe ", "i") )
+  ?aggregation edm:aggregatedCHO ?object .
+  ?aggregation edm:isShownBy ?view .
+  ?aggregation edm:rights ?rights .
+  ?object dc:title ?title .
+  ?object dc:creator ?creatorId .
+  ?creatorId skos:prefLabel ?creator .
+}
+
 ############### annotation concept query ###############
 PREFIX edm: <http://www.europeana.eu/schemas/edm/>
 PREFIX ore: <http://www.openarchives.org/ore/terms/>

src/helpers/objects.js

@@ -86,7 +86,7 @@ module.exports = {
         // only filter, since we have no suitable concepts to query for
         let filter = (parameters.common_name_nl || parameters.common_name).toLowerCase();
         const query = this.sparqlObjectQueries(filter)['edm_filter_desciption'];
-
+        console.log(query);
         return tripleStore.query(platform, query.query).then((values) => {
           return _this.processSparqlAggregations(values, 'dctype:Image');
         }).then((aggregations) => {
@@ -121,6 +121,7 @@ module.exports = {
 
     for (let i=0; i<results.length; i++) {
       const result = results[i];
+      console.log(result);
       const index = uris.indexOf(result.aggregation.value);
 
       // see if already present in aggregations
@@ -133,6 +134,7 @@ module.exports = {
         // extend information object when possible
         if (result.creator) culturalObject.addCreator(result.creator.value);
         if (result.title) culturalObject.addTitle(result.title.value);
+        if (result.description) culturalObject.addDescription(result.description.value);
 
         let aggregation = new Aggregation(
           result.aggregation.value,
@@ -168,15 +170,9 @@ module.exports = {
                 "?aggregation edm:aggregatedCHO ?object . " +
                 "?aggregation edm:isShownBy ?view . " +
                 "?aggregation edm:rights ?rights . " +
-                "OPTIONAL { " +
-                "  ?object dc:title ?title . " +
-                "   FILTER ( lang(?title) = \"en\" ) " +
-                "} " +
-                "OPTIONAL { " +
-                "  ?object dc:creator ?creatorId . " +
-                "  ?creatorId skos:prefLabel ?creator . " +
-                "  FILTER ( lang(?creator) = \"en\" ) " +
-                "} " +
+                "?object dc:title ?title . " +
+                "?object dc:creator ?creatorId . " +
+                "?creatorId skos:prefLabel ?creator . " +
               "} ",
             "name": "description filter"
           },
@@ -195,14 +191,9 @@ module.exports = {
                 "?aggregation edm:aggregatedCHO ?object . " +
                 "?aggregation edm:isShownBy ?view . " +
                 "?aggregation edm:rights ?rights . " +
-                "OPTIONAL { " +
-                "  ?object dc:title ?title . " +
-                "   FILTER ( lang(?title) = \"en\" ) " +
-                "} " +
-                "OPTIONAL { " +
-                "  ?object dc:creator ?creatorId . " +
-                "  ?creatorId skos:prefLabel ?creator . " +
-                "  FILTER ( lang(?creator) = \"en\" ) " +
+                "?object dc:title ?title . " +
+                "?object dc:creator ?creatorId . " +
+                "?creatorId skos:prefLabel ?creator . " +
                 "} " +
               "} ",
             "name": "description filter"