Linked Data Access Goes Mobile: Context Aware Authorization for Graph Stores
•
0 likes•1,249 views
![Key Features"
Background!
WAC, [Abel et al, ISWC2007], [Finin et al.,SACMAT2008],[Flouris et al., FIS2010],
[Sacco and Passant, LDOW2011], [Toninelli et al, ISWC2006]!
Semantic Web Pluggable to
languages only" any RDF store!
> No new Policy languages! > SPARQL 1.1!
Granularity from Mobile context in
triples to whole graphs! the loop!
> Named Graphs! > Context Awareness!
[Carroll
et
al,
WWW2005]
[Schilit
and
Theimer,
94]
RDF
1.1
[Dey,
01]
2](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Recommended
Recommended
More Related Content
Similar to Linked Data Access Goes Mobile: Context Aware Authorization for Graph Stores
Similar to Linked Data Access Goes Mobile: Context Aware Authorization for Graph Stores (20)
More from Luca Costabello
More from Luca Costabello (6)
Recently uploaded
Recently uploaded (20)
Linked Data Access Goes Mobile: Context Aware Authorization for Graph Stores
- 1. LDOW2012 Lyon, 16 April Linked Data Access Goes Mobile" Context-Aware Authorization for Graph Stores! SELECT … ! WHERE {…}! Luca Costabello, Serena Villata Nicolas Delaforge, Fabien Gandon
- 2. Key Features" Background! WAC, [Abel et al, ISWC2007], [Finin et al.,SACMAT2008],[Flouris et al., FIS2010], [Sacco and Passant, LDOW2011], [Toninelli et al, ISWC2006]! Semantic Web Pluggable to languages only" any RDF store! > No new Policy languages! > SPARQL 1.1! Granularity from Mobile context in triples to whole graphs! the loop! > Named Graphs! > Context Awareness! [Carroll et al, WWW2005] [Schilit and Theimer, 94] RDF 1.1 [Dey, 01] 2
- 3. How it Works – Initial Setup" ● Named Graph Partitioning! ! ● Access Policy Definition! !S4AC & PRISSMA Vocabularies! 3
- 4. Sample Access Policy" Protected resource Conditions to verify 4
- 5. How it Works" 1. Query Contextualization ! !! INSERT DATA { ! SELECT … ! U + GRAPH :ctx1{! WHERE {…}! P [! ! ! U P ,! ]! ,! , …! :ctx1! }}! 5
- 6. How it Works" 2. Access Policy Evaluation! ASK {?context ! a prissma:Context; ! prissma:environment ?env.! ?env prissma:currentPOI ?poi. ! ?poi prissma:radius "500";! foaf:based_near ?p. ! = "false" ?p geo:lat "43.615811";! geo:long "7.068532".} ! BINDINGS ?context {(:ctx1)}! U P 6
- 7. How it Works" 3. Query Execution on Accessible Named Graphs! :ng1 ! :ng2 ! SELECT … ! :ng3 ! WHERE {…}! SELECT …! FROM :ng2,:ng3! FROM NAMED :ng2,:ng3! WHERE {…}! 7
- 8. Response Time Evaluation" RDF store and SPARQL 1.1. engine: Corese-‐KGRAM with Berlin SPARQL Benchmark Dataset 3.1 • Dataset size still predominant! • More context updates, ! more consumers" à Slower! • Small fraction granted" à Faster!
- 9. Future Work" Privacy" Context data User-centered trustworthiness" evaluation" Luca Costabello | Serena Villata | Nicolas Delaforge | Fabien Gandon @lukostaz " " @serena_villata @ndelaforge" " @fabien_gandon" tinyurl.com/shi3ld