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Knowledge Enabled Information and Services Science

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Motivation

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Knowledge Enabled Information and Services Science Wisdom of the Crowds

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Knowledge Enabled Information and Services Science Collecting Knowledge

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Knowledge Enabled Information and Services Science

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Dont overshoot Generating a broad topic hierarchy on the basis of Wikipedia is easy The Problem is to restrict it to the actual domain of interest

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Knowledge Enabled Information and Services Science Simplifying assumptions We do not create a formal domain ontology Topic hierarchy will be used for classification and IR, not for reasoning Ontology Edition

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Knowledge Enabled Information and Services Science Hence Ontohazard We can safely take advantage of existing (semi)structured knowledge sources

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Knowledge Enabled Information and Services Science Requirements for the classifier Find pertinent terms

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Knowledge Enabled Information and Services Science Requirements for the classifier Classify the terms in a topic hierarchy

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Knowledge Enabled Information and Services Science Key Concepts Focus What is the narrow domain of interest? E.g. FTP Servers Domain What is the broader domain of interest? E.g. Networking, File Transfer World View Where is our world view centered? E.g. information sciences Different World View Different connections

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Knowledge Enabled Information and Services Science Overview - conceptual

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Knowledge Enabled Information and Services Science Expand - conceptually Full text search on Article texts Delete results with low Lucene score Graph-based expansion

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Knowledge Enabled Information and Services Science Links types - See Also link - Inverse See Also link - Double link - Link and common category - Inverse link and common category - Regular link - Inverse link

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Knowledge Enabled Information and Services Science Node Similarity computation

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Knowledge Enabled Information and Services Science Collecting Instances

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Knowledge Enabled Information and Services Science Creating a Hierarchy

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Knowledge Enabled Information and Services Science Creating a Hierarchy

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Knowledge Enabled Information and Services Science Hierarchy Creation - summary

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Knowledge Enabled Information and Services Science Reduce steps Remove all terms that have low pertinence to the domain Intersect hierarchy with broader focus domain Reduce hierarchy depth

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Knowledge Enabled Information and Services Science Remove unwanted individuals

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Knowledge Enabled Information and Services Science Remove unwanted categories

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Knowledge Enabled Information and Services Science Flatten categories

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Knowledge Enabled Information and Services Science Snapshot of final Topic Hierarchy

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Knowledge Enabled Information and Services Science Evaluation wrt. Search and Set Expansion Top2 nd 3 rd 4 th 5 th Google Sets mortgageoverviewcontact brochures photospersonal finance Groxis Grokker Tort lawLost, mislaid, and abandoned property Mortgage loanLaw of Property Act 1925 (c.20... Leasehold estate Doozer Mortgage LoanMortgageTeachers' Building Society Mortgage-backed Security Agency Securities Powerset Mortgage loanMortgage brokerMortgage underwriting 2007 Subprime mortgage financial crisis Mortgage discrimination Wikimedia MortgageMortgage loanMortgage-backed security Mortgage discrimination 6 th 7 th 8 th 9 th 10 th Google Sets foreclosureshouses for salereal estate training people searchmortgage lendingtree Groxis Grokker Non-possessory interest in land BankNon-recourse debt Lateral and subjacent support Mortgage Doozer Uk Mortgage Terminology Mortgage NoteAdjustable Rate Mortgage Graduated Payment Mortgage Loan Interest-only Loan Powerset Shared appreciation mortgage Mortgage life insurance Biweekly Mortgage MortgageForeign currency mortgage Wikimedia Mortgage brokerMortgage bankAdjustable rate mortgage Lenders mortgage insurance Ameriquest Mortgage

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Knowledge Enabled Information and Services Science Evaluation wrt. other term expansion tools F-measures, computed against a reduced glossary, for the lists of terms generated by various mining tools

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Knowledge Enabled Information and Services Science Evaluation wrt. expert model Evaluation wrt. MeSH versions of 2004 (04) and 2008 (08) for both the restricted and the full set of MeSH term

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Knowledge Enabled Information and Services Science