The Berlin SPARQL Benchmark

The
Berlin SPARQL Benchmark
Christian Bizer
Andreas Schultz
Freie Universität Berlin
Indianapolis.
August 2
0
, 2008
Christian Bizer:
The Berlin SPARQL Benchmark (8/20/
20
08)


Overview
1.
The SPARQL Query Language and Protocol
What is SPARQL?
2.
Design of the Berlin SPARQL Benchmark
The dataset and the query mix
3.
Benchmark Experiment and Results
Which store is the best one?
Christian Bizer:
The Berlin SPARQL Benchmark (8/20/
20
08)



1. The SPARQL Query Language for RDF
Flexible query language for the RDF data model
W3C Recommendation since 15 January 2008
Example Query
PREFIX foaf:
SELECT
?name ?mbox
WHERE
{ ?x foaf:name
?name .
?x foaf:mbox
?mbox
}
Query Result
?name
?mbox
"Johnny Lee Outlaw"

"Peter Goodguy"

Christian Bizer:
The Berlin SPARQL Benchmark (8/20/
20
08)













SPARQL Implementations
There are currently 22 SPARQL implementations
http://esw.w3.org/topic/
SparqlImplementations
Example RDF stores
Sesame
Jena SDB, TDB
OpenLink
V
irtuoso
SemWeb
.Net Library
Relational database to RDF wrappers
D2R Server
OpenLink
V
irtuoso
See also: W3C RDB 2 RDF Incubator Group
Federated SPARQL Query Engines
DARQ
The Semantic Discovery System
Christian Bizer:
The Berlin SPARQL Benchmark (8/20/
20
08)




The SPARQL Protocol for RDF
for sending SPARQL queries to an SPARQL endpoint
HTTP Binding
SOAP Binding
W3C ...