Unsupervised Ontology Induction From Text - Microsoft Research
Unsupervised Ontology Induction From Text - Microsoft Research Unsupervised Ontology Induction From Text - Microsoft Research
Why Ontology? • Compact representation and efficient reasoning [Staab & Studer 2004] • Better generalization Interestingly, the DEX-mediated IkappaBalpha induction was completely inhibited by IL-2, but not IL-4, in Th1 cells, while the reverse profile was seen in Th2 cells. Q: What does IL-2 regulate? REGULATE ISA INHIBIT A: The DEX-mediated IkappaBalpha induction 8
Ontology Learning • Attracts increasing interest [Snow et al. 2006, Cimiano 2006, Suchanek et al. 2008, Wu & Weld 2008] • Induction: Construct an ontology • Population: Map textual expressions to concepts and relations in the ontology • Limitations in existing approaches • Require heuristic patterns or existing KBs • Pursue each task in isolation Knowledge representation NLP 9
- Page 1 and 2: Unsupervised Ontology Induction Fro
- Page 5 and 6: Extracting Knowledge From Text …
- Page 7: Unsupervised Learning for Knowledge
- Page 11 and 12: Outline • Background: USP • Uns
- Page 13 and 14: Challenge: Same Meaning, Many Varia
- Page 15 and 16: Unsupervised Semantic Parsing • U
- Page 17 and 18: Unsupervised Semantic Parsing • U
- Page 19 and 20: Unsupervised Semantic Parsing • U
- Page 21 and 22: Unsupervised Semantic Parsing • E
- Page 23 and 24: Learning: Hill-Climb Likelihood Ini
- Page 25 and 26: OntoUSP • USP + Hierarchical clus
- Page 27 and 28: Experiments • Evaluate on an end
- Page 29 and 30: Induced Ontology (Partial)
- Page 31: Conclusion • OntoUSP: Unsupervise
<strong>Ontology</strong> Learning<br />
• Attracts increasing interest [Snow et al. 2006,<br />
Cimiano 2006, Suchanek et al. 2008, Wu & Weld 2008]<br />
• <strong>Induction</strong>: Construct an ontology<br />
• Population: Map textual expressions to concepts<br />
and relations in the ontology<br />
• Limitations in existing approaches<br />
• Require heuristic patterns or existing KBs<br />
• Pursue each task in isolation<br />
Knowledge representation<br />
NLP<br />
9
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