Knowledge-Based NLP and the Semantic Web Sergei Nirenburg
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Transcript of Knowledge-Based NLP and the Semantic Web Sergei Nirenburg
Knowledge-Based NLP and the Semantic Web
Sergei NirenburgInstitute for Language and Information
TechnologiesUniversity of Maryland Baltimore County
Workshop on the Semantic Web,Newark, NJ
October 24, 2002
User types in question
Processing Stages are highlighted
Results appear as they become available
Final answer presented as links to the facts
Ontological-Semantic Analysis
Fact DB
Processors
Knowledge
Text MeaningRepresentation(TMR)
Ontology
LexiconsGrammars
Sources
Text Traffic
Query
Ontological-Semantic Generation
Response
FACT DATABASE: The “Asian-Nation” Instance: “Turkey”
LEXICON: Chinese lexical entry mapped to concept “EXIT”
Depth of Coverage
Breadth of Coverage
Language Dependent?
Application- Oriented?
Sensus Shallow Broad Yes/No Yes Wordnet Shallow Broad Yes No EuroWN Shallow Broad Yes/No No CYC Deep Medium/
Broad? No No
Ontosem Deep Medium No Yes
Shallow Comparison of Some Knowledge Bases in NLPThat Are Often Called Ontologies
Knowledge-Based NLP and the Semantic Web
or:Are You Being Served?
Sergei NirenburgInstitute for Language and Information Technologies
University of Maryland Baltimore County
Workshop on the Semantic Web,Newark, NJ
October 24, 2002