From WikiPathways

Revision as of 15:34, 24 October 2012

On sparql.wikipathways.org wikipathways content is replicated. Currently this SPARQL endpoint is being developed, with very irregular updates.

Prefixes

Below are example queries. For readability we have omitted the prefixes. We use the following prefixes: (Not complete yet)

PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX dc: <http://purl.org/dc/elements/1.1/>
PREFIX foaf: <http://xmlns.com/foaf/0.1/>
PREFIX schema: <http://schema.org/>

Example queries

Queries with a * requires a bit more time for results.

Data curation oriented queries

Get the pathway with the erroneous data source "null"

SELECT DISTINCT  ?identifier ?pathway ?label
WHERE {
        ?concept dc:source "null"^^xsd:string .
        ?concept dc:identifier ?identifier .
        ?concept dcterms:isPartOf ?pathway .
        ?concept rdfs:label ?label
} 

sparqlbin Execute

Pathway oriented queries

Get the species currently in WikiPathways with their respective URI's

SELECT DISTINCT ?organism ?label
WHERE {
    ?concept wp:organism ?organism .
    ?organism rdfs:label ?label .
 } 

Execute

List pathways and their species

SELECT DISTINCT ?title ?label 
WHERE {
    ?pathway dc:title ?title .
    ?pathway wp:organism ?organism .
    ?organism rdfs:label ?label .
 } 

Sparqlbin

List the species captured in WikiPathways and the number of pathways per species

SELECT DISTINCT ?organism ?label count(?pathway) as ?noPathways
WHERE {
    ?pathway dc:title ?title .
    ?pathway wp:organism ?organism .
    ?organism rdfs:label ?label .
 }
ORDER BY DESC(?noPathways)

Sparqlbin

Datasource oriented queries

SELECT DISTINCT ?datasource 
WHERE {
         ?concept dc:source ?datasource
} 

SELECT DISTINCT ?datasource count(?datasource) as ?numberEntries 
WHERE {
        ?concept dc:source ?datasource
} 
ORDER BY DESC(?numberEntries)

SELECT DISTINCT ?datasource ?identifier count(?identifier) AS ?numberEntries 
WHERE {
        ?concept dc:source ?datasource .
        ?concept dc:identifier ?identifier
} 

SELECT DISTINCT ?datasource ?identifier count(?identifier) AS ?numberEntries 
WHERE {
        ?concept dc:source ?datasource .
        ?concept dc:identifier ?identifier
} 
ORDER BY DESC(?numberEntries)

SELECT DISTINCT ?identifier ?pathway
WHERE {
        ?concept dcterms:isPartOf ?pathway .
        ?concept dc:source "ChEMBL compound"^^xsd:string .
        ?concept dc:identifier ?identifier .
        
} 

Curators oriented queries

SELECT DISTINCT ?contributor  
WHERE {
       ?pathway dc:contributor ?contributor
}

SELECT DISTINCT ?contributor, count(?pathway) as ?pathwaysEdited  
WHERE {
       ?pathway dc:contributor ?contributor
}
ORDER BY DESC(?pathwaysEdited)

SELECT DISTINCT ?pathway, ?pathwayLabel
WHERE {
       ?pathway dc:contributor wpuser:Andra .
       ?pathway dc:contributor ?contributor .
       ?pathway rdfs:label ?pathwayLabel .
}

Federated queries

Code examples

Java

For java we recommend the Jena Framework.

import com.hp.hpl.jena.query.Query;
import com.hp.hpl.jena.query.QueryExecution;
import com.hp.hpl.jena.query.QueryExecutionFactory;
import com.hp.hpl.jena.query.QueryFactory;
import com.hp.hpl.jena.query.QuerySolution;
import com.hp.hpl.jena.query.ResultSet;

public class javaCodeExample {

	public static void main(String[] args) {
		String sparqlQueryString = "SELECT * WHERE {?s ?p ?o} LIMIT 10";
		Query query = QueryFactory.create(sparqlQueryString);
		QueryExecution queryExecution = QueryExecutionFactory.sparqlService("http://sparql.wikipathways.org", query);
		ResultSet resultSet = queryExecution.execSelect();
		while (resultSet.hasNext()) {
			QuerySolution solution = resultSet.next();
			System.out.print(solution.get("s"));
			System.out.print("\t"+solution.get("p"));
			System.out.println("\t"+solution.get("o"));
		}
	}
}

php

For php we recommend the arc2: Easy RDF and SPARQL for LAMP systems

SPARQL from the command line

For quick and easy querying, we recommend to use curl (Linux and OS X)

curl -F "query=SELECT * WHERE {?s ?p ?o} LIMIT 10" http://sparql.wikipathways.org