X Som Graduation Presentation

An Ontology-Based Data Integration System: Solving Semantic Inconsistencies Giorgio Orsi October 23, 2006 X-SOM (eXtensible Smart Ontology Mapper) Politecnico di Milano

Introduction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Why Ontologies? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Ontology Matching Vehicle SportCar Car Truck Motorized Motorless SW SportCar Wheel Vehicle Bicycle 1.0 0.5 0.7 1.0 0.3 1.0

Approaches ,[object Object],[object Object],[object Object],[object Object]

Additional Requirements Issues What we need ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

X-SOM's Components XML/OWL OWL Loader OWL dialect verifier Mapper Mapping Strategy WordNet String Metrics Walk ISLab HMatch OWL Input Ontologies Output Ontology Writer I/O Mapper Modules Module Interface Module Interface Module Interface Module Interface Modules Registry Average Functions Registry XML XML Config. Files Consistency Checker Manual mapper Module Interface Google API Module Interface ... Module Interface Neural Network Trainer Training Set Builder GUI

Aggregation: The Neural Network y=ax y=ax y=ax y=ax Jaro Module WordNet Module ISLab HMatch Another Module y=sigm(x) y=sigm(x) y=sigm(x) y=sigm(x) ,[object Object],[object Object]

Consistency Checking ,[object Object],[object Object],[object Object],[object Object],[object Object]

Inconsistencies Sympthoms O2:Y O2:Z O1:X ,[object Object],[object Object],Master O1:Student Bachelor Ph.D. Master Bachelor O2:Student unionOf unionOf DisjointWith DisjointWith DisjointWith equivalentClass equivalentClass equivalentClass equivalentClass

Semantic inconsistencies Reader Author Organization Person Author Person subclassOf subclassOf subclassOf subclassOf equivalentClass

Semantic inconsistencies Reader Author Organization Person Author Person subclassOf subclassOf subclassOf subclassOf equivalentClass “ Everything that is an author is also a person” “ An organization is a person” Wrong!

Conclusions and Future Works ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Questions? Further details: [email_address] http://context-addict.elet.polimi.it/

Performance Measures: ,[object Object],[object Object],[object Object],[object Object],Ω CM RM CRM ,[object Object]

X Som Graduation Presentation

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