IBISBA Knowledge Hub

Example Queries

List all classes Example

Find all RDF classes used in the dataset

SELECT DISTINCT ?class
WHERE {
  [] a ?class
}
LIMIT 20

Sample triples Example

Show basic subject-predicate-object patterns

SELECT ?subject ?predicate ?object
WHERE {
  ?subject ?predicate ?object .
}
LIMIT 10

List all properties Example

Find all predicates/properties used

SELECT DISTINCT ?property
WHERE {
  [] ?property []
}
LIMIT 20

Count entities by type Example

Count how many entities exist for each class

SELECT ?type (COUNT(?entity) as ?count)
WHERE {
  ?entity a ?type
}
GROUP BY ?type
ORDER BY DESC(?count)

Describe a resource Example

Get all information about a specific resource (replace with actual URI)

DESCRIBE <http://example.org/resource>

Find organisms Example

Look for organism-related data

SELECT DISTINCT ?organism ?label
WHERE {
  ?organism a ?type .
  FILTER(CONTAINS(LCASE(STR(?type)), "organism") || 
         CONTAINS(LCASE(STR(?type)), "species") ||
         CONTAINS(LCASE(STR(?type)), "taxon"))
  OPTIONAL { ?organism rdfs:label ?label }
}
LIMIT 10

Find projects Example

Look for project-related data

SELECT DISTINCT ?project ?title
WHERE {
  ?project a ?type .
  FILTER(CONTAINS(LCASE(STR(?type)), "project"))
  OPTIONAL { ?project dc:title ?title }
  OPTIONAL { ?project dcterms:title ?title }
  OPTIONAL { ?project rdfs:label ?title }
}
LIMIT 10

Find studies Example

Look for study-related data

SELECT DISTINCT ?study ?title
WHERE {
  ?study a ?type .
  FILTER(CONTAINS(LCASE(STR(?type)), "study"))
  OPTIONAL { ?study dc:title ?title }
  OPTIONAL { ?study dcterms:title ?title }
  OPTIONAL { ?study rdfs:label ?title }
}
LIMIT 10

List named graphs Example

Show all named graphs in the dataset

SELECT DISTINCT ?graph
WHERE {
  GRAPH ?graph {
    ?s ?p ?o
  }
}
LIMIT 10

SPARQL Query Interface