Fix RDF visualization: correct SPARQL namespaces and show all node types
- Update SPARQL CONSTRUCT query to use correct ontology namespaces: - hc: https://w3id.org/heritage/custodian/ (was nde) - Use nde:Custodian type (was crm:E39_Actor) - Use schema:location + geo:lat/long (was crm predicates) - Remove LIMIT 500 clause to fetch all results - Show all node types by default instead of random single type - Fixes issue where Knowledge Graph showed incomplete/random data
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1 changed files with 63 additions and 88 deletions
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@ -490,99 +490,82 @@ export function Visualize() {
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? (import.meta.env.VITE_SPARQL_ENDPOINT || 'http://localhost:7878/query')
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: '/query'; // Always use relative URL in production
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// SPARQL query aligned with actual RDF generated by oxigraph_sync.py and oxigraph_person_sync.py
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// Namespaces match the Python sync scripts:
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// - nde: <https://nde.nl/ontology/hc/class/> for Custodian type
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// - hc: <https://w3id.org/heritage/custodian/> for ghcid, isil predicates
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// - hp: <https://w3id.org/heritage/person/> for person URIs
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const constructQuery = `
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PREFIX crm: <http://www.cidoc-crm.org/cidoc-crm/>
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PREFIX hc: <https://nde.nl/ontology/hc/>
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PREFIX hcc: <https://nde.nl/ontology/hc/class/>
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PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
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PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
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PREFIX skos: <http://www.w3.org/2004/02/skos/core#>
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PREFIX schema: <http://schema.org/>
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PREFIX foaf: <http://xmlns.com/foaf/0.1/>
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PREFIX dcterms: <http://purl.org/dc/terms/>
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PREFIX owl: <http://www.w3.org/2002/07/owl#>
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PREFIX prov: <http://www.w3.org/ns/prov#>
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PREFIX org: <http://www.w3.org/ns/org#>
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PREFIX geo: <http://www.w3.org/2003/01/geo/wgs84_pos#>
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PREFIX cidoc: <http://www.cidoc-crm.org/cidoc-crm/>
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PREFIX nde: <https://nde.nl/ontology/hc/class/>
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PREFIX hc: <https://w3id.org/heritage/custodian/>
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PREFIX hp: <https://w3id.org/heritage/person/>
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CONSTRUCT {
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# Core custodian data
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?custodian a crm:E39_Actor ;
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skos:prefLabel ?label ;
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skos:altLabel ?altLabel ;
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hc:custodian_type ?type ;
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dcterms:identifier ?dcId .
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# Custodians - core data
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?custodian a nde:Custodian ;
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rdfs:label ?label ;
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skos:prefLabel ?prefLabel ;
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schema:name ?name ;
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hc:ghcid ?ghcid ;
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hc:isil ?isil ;
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schema:url ?website ;
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foaf:homepage ?homepage ;
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owl:sameAs ?wikidata .
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# Location with coordinates
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?custodian crm:P53_has_former_or_current_location ?place .
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?place a schema:Place ;
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schema:latitude ?lat ;
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schema:longitude ?lon ;
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schema:address ?address .
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# Location (schema:location, not crm:P53)
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?custodian schema:location ?location .
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?location geo:lat ?lat ;
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geo:long ?lon .
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# Identifiers (creates edges: custodian -> identifier)
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?custodian crm:P48_has_preferred_identifier ?identifier .
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?identifier a crm:E42_Identifier ;
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skos:inScheme ?scheme ;
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skos:notation ?notation ;
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schema:url ?identUrl .
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# Digital platform / website
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?custodian foaf:homepage ?platform .
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?platform a hcc:DigitalPlatform ;
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schema:url ?platformUrl .
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# Social media profiles (creates edges: custodian -> social)
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?custodian foaf:account ?social .
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?social a foaf:OnlineAccount ;
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hc:platform_type ?socialType ;
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foaf:accountName ?accountName ;
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foaf:accountServiceHomepage ?socialUrl .
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# Wikidata/VIAF sameAs links (creates edges)
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?custodian owl:sameAs ?sameAs .
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# GeoNames containedInPlace
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?custodian schema:containedInPlace ?geonames .
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# Persons linked to custodians
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?person a schema:Person ;
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rdfs:label ?personLabel ;
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schema:name ?personName ;
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schema:worksFor ?custodian ;
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org:memberOf ?custodian ;
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schema:jobTitle ?jobTitle .
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}
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WHERE {
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?custodian a crm:E39_Actor .
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OPTIONAL { ?custodian skos:prefLabel ?label }
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OPTIONAL { ?custodian skos:altLabel ?altLabel }
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OPTIONAL { ?custodian hc:custodian_type ?type }
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OPTIONAL { ?custodian dcterms:identifier ?dcId }
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# Location
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# Get all custodians (nde:Custodian is the primary type)
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?custodian a nde:Custodian .
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OPTIONAL { ?custodian rdfs:label ?label }
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OPTIONAL { ?custodian skos:prefLabel ?prefLabel }
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OPTIONAL { ?custodian schema:name ?name }
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OPTIONAL { ?custodian hc:ghcid ?ghcid }
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OPTIONAL { ?custodian hc:isil ?isil }
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OPTIONAL { ?custodian schema:url ?website }
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OPTIONAL { ?custodian foaf:homepage ?homepage }
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OPTIONAL {
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?custodian crm:P53_has_former_or_current_location ?place .
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OPTIONAL { ?place schema:latitude ?lat }
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OPTIONAL { ?place schema:longitude ?lon }
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OPTIONAL { ?place schema:address ?address }
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?custodian owl:sameAs ?wikidata .
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FILTER(STRSTARTS(STR(?wikidata), "http://www.wikidata.org/"))
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}
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# Identifiers
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# Location using schema:location (as generated by oxigraph_sync.py)
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OPTIONAL {
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?custodian crm:P48_has_preferred_identifier ?identifier .
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OPTIONAL { ?identifier skos:inScheme ?scheme }
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OPTIONAL { ?identifier skos:notation ?notation }
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OPTIONAL { ?identifier schema:url ?identUrl }
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?custodian schema:location ?location .
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OPTIONAL { ?location geo:lat ?lat }
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OPTIONAL { ?location geo:long ?lon }
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}
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# Digital platform
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# Persons linked to custodians via schema:worksFor
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OPTIONAL {
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?custodian foaf:homepage ?platform .
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OPTIONAL { ?platform schema:url ?platformUrl }
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?person a schema:Person ;
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schema:worksFor ?custodian .
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OPTIONAL { ?person rdfs:label ?personLabel }
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OPTIONAL { ?person schema:name ?personName }
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OPTIONAL { ?person schema:jobTitle ?jobTitle }
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OPTIONAL { ?person org:memberOf ?custodian }
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}
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# Social media
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OPTIONAL {
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?custodian foaf:account ?social .
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OPTIONAL { ?social hc:platform_type ?socialType }
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OPTIONAL { ?social foaf:accountName ?accountName }
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OPTIONAL { ?social foaf:accountServiceHomepage ?socialUrl }
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}
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# External links
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OPTIONAL { ?custodian owl:sameAs ?sameAs }
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OPTIONAL { ?custodian schema:containedInPlace ?geonames }
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}
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LIMIT 500
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`;
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let rdfData = '';
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@ -638,25 +621,17 @@ export function Visualize() {
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console.log(`Parsed: ${result.nodes.length} nodes, ${result.links.length} links`);
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loadGraphData(result);
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// After loading, set filter to show just ONE random node type
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// This prevents overwhelming users with all ~500 nodes
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// Show ALL node types by default - no random filtering
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// Users can filter down using the sidebar controls if needed
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if (result.nodes.length > 0) {
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// Extract unique node types from the result
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const uniqueTypes = new Set(result.nodes.map(n => n.type));
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const typesArray = Array.from(uniqueTypes);
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if (typesArray.length > 0) {
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// Pick one random type
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const randomIndex = Math.floor(Math.random() * typesArray.length);
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const randomType = typesArray[randomIndex];
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// Set filter to only show this one type
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setFilters({ nodeTypes: new Set([randomType]) });
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// Count nodes of this type
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const nodesOfType = result.nodes.filter(n => n.type === randomType);
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console.log(`RDF loaded: showing ${nodesOfType.length} nodes of type "${randomType}" (${result.nodes.length} total). Click "All" to see everything.`);
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}
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// Set filter to show ALL types by default
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setFilters({ nodeTypes: new Set(typesArray) });
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console.log(`RDF loaded: showing all ${result.nodes.length} nodes across ${typesArray.length} types: ${typesArray.join(', ')}`);
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}
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// Update cache state
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