[tracker] NIE: Create index for nie:url

[Jürg Billeter <juergbi src gnome org>]

commit 82d5611f729ba545687e6d01bafa1e7bc68fa753
Author: Jürg Billeter <j bitron ch>
Date:   Tue Feb 2 08:17:45 2010 +0100

    NIE: Create index for nie:url
    
    Fixes performance issues such as very slow crawling on startup.

 data/ontologies/30-nie.ontology |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/data/ontologies/30-nie.ontology b/data/ontologies/30-nie.ontology
index d6e0e61..2b5f92a 100644
--- a/data/ontologies/30-nie.ontology
+++ b/data/ontologies/30-nie.ontology
@@ -270,4 +270,5 @@ nie:url a rdf:Property ;
 	rdfs:comment "URL pointing at the location of the resource. In cases where creating a simple file:// or http:// URL for a file is difficult (e.g. for files inside compressed archives) the applications are encouraged to use conventions defined by Apache Commons VFS Project at http://jakarta.apache.org/  commons/ vfs/ filesystems.html." ;
 	nrl:maxCardinality 1 ;
 	rdfs:domain nie:DataObject ;
-	rdfs:range xsd:string .
+	rdfs:range xsd:string ;
+	tracker:indexed true .