[JENA-802] wrong identifiers returned by spatial:nearby when using bnodes

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Fuseki 1.0.1, Fuseki 1.1.1
• Fix Version/s: Jena 2.13.0
• Component/s: Spatial

Environment

Linux Ubuntu 12:10. JVM 1.7.0_09

• Assignee: Andy Seaborne
• Reporter: Luigi Selmi
• Created: 20/Oct/14 08:39
• Updated: 22/Oct/14 15:31
• Resolved: 21/Oct/14 18:46

Description

I had to use blank nodes for objects that do not have a public http uri. I imported a data set with geo:lat and geo:long coordinates in Fuseki 1.1.1 then I created the Lucence index as described in the doc about Jena Spatial. An example sub set I used is the following

@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix airports_sc: <http://airports.dataincubator.org/schema/> .
@prefix geo: <http://www.w3.org/2003/01/geo/wgs84_pos#> .

_:node1 rdf:type airports_sc:LargeAirport ;
    geo:lat "52.4539"^^xsd:float ;
    geo:long "-1.74803"^^xsd:float ;
    rdfs:label "Birmingham International Airport" 
  . 

Then I run the following query

PREFIX spatial: <http://jena.apache.org/spatial#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
SELECT * 
FROM <http://test.org/1/>
{
  ?airport spatial:nearby (52.45 -1.74 10 'km') .
  ?airport rdfs:label ?placeName .
}

The returned result was empty, then I removed the clause with the rdfs:label predicate and Fuseki returned a value for ?airport. This values is different from the bnode assigned by Fuseki during the import and that is why the above query returned no results.