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Seman'c 
Web 
Media'on 
Béatrice 
BOUCHOU 
MARKHOFF, 
Cheikh 
NIANG 
Laboratoire 
d’InformaAque 
Université 
François 
Rabelais 
de 
Tours 
France
ž SemanAc 
web 
mediaAon 
ž 1rst 
step: 
semanAc 
access 
to 
data 
ž 2nd 
step: 
mediaAon 
ž ApplicaAon: 
the 
Personae 
project
ž The 
objecAve 
is 
Data 
IntegraAon 
BD 
BD 
Uniform 
access 
to 
distributed 
sources 
BD 
Source1 
Source2 
Source3 
Common 
interface 
XML
ž Data 
warehouse 
[Wikipedia, 
nov-­‐2013] 
ETL: 
ExtracAng-­‐Transforming-­‐Loading
ž MediaAon 
[Lenzerini 
2002] 
[Wikipedia, 
nov-­‐2013]
ž Using 
ontologies 
for 
data 
integraAon 
[Wache 
et 
al. 
2001] 
Single'Ontology 
Global* Ontology 
S1  S2  Sn 
[B.$Amann$et$al.$2002] 
Multiple(Ontologies 
Local* 
Ontology 
Local* 
Ontology 
Local* 
Ontology 
S1  S  2 Sn 
[Menaetal.2000] 
Hybrid 
S1 
Shared vocabulary 
  
S2 Sn 
Local* 
Ontology 
Local* 
Ontology 
Local* 
Ontology 
[I.$F.$Cruz$et$al.$2009] 
ž SemanAc 
Web…
ž Ontology-­‐based 
mediaAon 
ž 1rst 
step: 
semanAc 
access 
to 
data 
ž 2nd 
step: 
mediaAon 
ž ApplicaAon: 
the 
Personae 
project
SPARQL SPARQL 
Triplestore 
Source 
data 
Ontology 
ApplicaAon 
OBDA 
mappings 
[Calvanese 
et 
al. 
2007] 
Source 
data 
Extract 
Transform 
Load 
ApplicaAon 
SW 
data 
SW 
data
Mediator 
ApplicaAon 
SW 
data 
SW 
data 
SW 
data 
SPARQL 
SPARQL
Local 
ontology 
Source3 
Local 
ontology 
Global ontology 
Mapping 
Source1 Source2 
S 
O 
U 
R 
C 
E 
S 
REFERENCE 
ONTOLOGY 
Agreement Agreement 
Local 
data Local 
data 
Local 
data 
Local 
data 
Local 
ontology 
Agreement 
[Niang 
et 
al. 
2011, 
2013] 
align 
M 
E 
D 
I 
A 
T 
O 
R
[Bouchou, 
Niang 
2014] 
Local 
ontology 
Source3 
Local 
Global ontology 
ontology 
Local 
ontology 
Mapping 
Source2 
Source1 
M 
E 
D 
I 
A 
T 
O 
R 
S 
O 
U 
R 
C 
E 
S 
Agreement 
User Interface 
or 
SPARQL endpoint 
Query 
rewriting 
Quey 
dispatching 
Answers 
collection 
Query 
Global answer 
Agreement Agreement 
Local 
data Local 
data 
Local 
data 
Local 
data 
Partial 
answers
ž Ontology-­‐based 
mediaAon 
ž 1rst 
step: 
semanAc 
access 
to 
data 
ž 2nd 
step: 
mediaAon 
ž ApplicaAon: 
the 
Personae 
project
Sparql 
Query 
Interfaces 
Cartography 
Social 
Networks 
Thesaurus 
Students 
PoiAers 
Lesellier 
Orléans 
Chantres 
Tours 
Bude 
Paris 
Ontop 
Ontop 
Ontop 
Ontop 
Sparql 
Sparql 
Sparql 
SemanAc 
Web 
Web 
Site 
Web 
Site 
Sparql 
PERSONAE 
MEDIATOR 
Sparql 
hap://ontop.inf.unibz.it/
ž 1rst 
step: 
provide 
a 
semanAc 
access 
to 
data 
› Not 
obvious 
even 
if 
tools 
exist, 
depends 
on 
the 
ontology 
describing 
the 
data 
ž 2nd 
step: 
mediaAon 
› AutomaAc 
building 
depends 
on 
the 
reference 
ontology 
› Limits 
of 
too 
general 
ontologies 
(s.t. 
YAGO2) 
› CIDOC 
CRM 
ž Towards 
dynamically 
structuring 
the 
LOD, 
for 
facilitaAng 
the 
querying 
step 
for 
client 
applicaAons.
Kno we scape2014-thess-bouchoumarkhoff

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Kno we scape2014-thess-bouchoumarkhoff

  • 1. Seman'c Web Media'on Béatrice BOUCHOU MARKHOFF, Cheikh NIANG Laboratoire d’InformaAque Université François Rabelais de Tours France
  • 2. ž SemanAc web mediaAon ž 1rst step: semanAc access to data ž 2nd step: mediaAon ž ApplicaAon: the Personae project
  • 3. ž The objecAve is Data IntegraAon BD BD Uniform access to distributed sources BD Source1 Source2 Source3 Common interface XML
  • 4. ž Data warehouse [Wikipedia, nov-­‐2013] ETL: ExtracAng-­‐Transforming-­‐Loading
  • 5. ž MediaAon [Lenzerini 2002] [Wikipedia, nov-­‐2013]
  • 6. ž Using ontologies for data integraAon [Wache et al. 2001] Single'Ontology Global* Ontology S1 S2 Sn [B.$Amann$et$al.$2002] Multiple(Ontologies Local* Ontology Local* Ontology Local* Ontology S1 S 2 Sn [Menaetal.2000] Hybrid S1 Shared vocabulary S2 Sn Local* Ontology Local* Ontology Local* Ontology [I.$F.$Cruz$et$al.$2009] ž SemanAc Web…
  • 7. ž Ontology-­‐based mediaAon ž 1rst step: semanAc access to data ž 2nd step: mediaAon ž ApplicaAon: the Personae project
  • 8. SPARQL SPARQL Triplestore Source data Ontology ApplicaAon OBDA mappings [Calvanese et al. 2007] Source data Extract Transform Load ApplicaAon SW data SW data
  • 9. Mediator ApplicaAon SW data SW data SW data SPARQL SPARQL
  • 10. Local ontology Source3 Local ontology Global ontology Mapping Source1 Source2 S O U R C E S REFERENCE ONTOLOGY Agreement Agreement Local data Local data Local data Local data Local ontology Agreement [Niang et al. 2011, 2013] align M E D I A T O R
  • 11. [Bouchou, Niang 2014] Local ontology Source3 Local Global ontology ontology Local ontology Mapping Source2 Source1 M E D I A T O R S O U R C E S Agreement User Interface or SPARQL endpoint Query rewriting Quey dispatching Answers collection Query Global answer Agreement Agreement Local data Local data Local data Local data Partial answers
  • 12. ž Ontology-­‐based mediaAon ž 1rst step: semanAc access to data ž 2nd step: mediaAon ž ApplicaAon: the Personae project
  • 13. Sparql Query Interfaces Cartography Social Networks Thesaurus Students PoiAers Lesellier Orléans Chantres Tours Bude Paris Ontop Ontop Ontop Ontop Sparql Sparql Sparql SemanAc Web Web Site Web Site Sparql PERSONAE MEDIATOR Sparql hap://ontop.inf.unibz.it/
  • 14. ž 1rst step: provide a semanAc access to data › Not obvious even if tools exist, depends on the ontology describing the data ž 2nd step: mediaAon › AutomaAc building depends on the reference ontology › Limits of too general ontologies (s.t. YAGO2) › CIDOC CRM ž Towards dynamically structuring the LOD, for facilitaAng the querying step for client applicaAons.