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1 חיפוש ויז ואלי מ בוסס אונ תו לו גיה ד"ר אורי חנני May Info מושגי יסוד ורקע תו כ ן ה הרצאה מהי אנתול וגיה 2.ס בי בת הע בוד ה של החיפוש הויז ואלי 3.המחשו ת 4.אירו ע ים מהשטח 5.סיכ ו ם והשלכות ע ל ה- Semantic Web 3.0 ו- Web 2
2 Information Representation 1. Terms keywords and phrases 2. Index An ordered list of terms paired with pointers to content within a collection 3. Glossary A list of terms with single definitions with respect to a particular domain 4. Vocabulary A list of terms, sometimes with definitions. A single level taxonomy. A vocabulary can be considered a very localized glossary 5. Dictionary An organized collection of definitions and uses of terms. A term may have more than one definition and more than one use 6. Thesaurus A collection of terms, their definitions (that may be multiple) and relationships to other terms 3 Information Representation 7. Taxonomy A structured vocabulary that embodies relationships among terms. The most common relationship is a hierarchy (tree structure). Some major taxonomies are: MARC, LCSH, MeSH 8. Ontology A particular theory about the nature of being or the kinds of existents 4
3 Taxonomy Weaknesses Terrorism Hierarchical structure Type Redundancy to create multiple Nuclear perspectives Southeast Asia Middle East Logical manner of subdivided classes Biological Disability to connects different leaves Southeast Asia Middle East Chemical Southeast Asia Fixed relations types and impact Middle East Identical relations (BT/NT, RT) Religion Identical impact no weighting Islamic Christian differentiation Groups Al-Qaeda Jemaa Islamiah Taxonomy terms impact Key People Identical impact - no weighting Osama bin Laden Al-Ghozi differentiation 5 What is Ontology? An Ontology is A formal definition of a body of knowledge A conceptual model of some portion of the world A collection of terms, relations and definitions relevant to a domain of knowledge A network of relationships or associations among concepts, augmented by ways that govern the behavior of the concepts 6
4 What is Ontology? An ontology is more than a taxonomy Terms importance differentiation Richer relationships between terms Variant relations definitions such as: Types Weights Multiple perspectives of the domain-specific knowledge 7 Taxonomy vs. Ontology Taxonomy Ontology 8 Al-QAEDA REGIONS Pakistan Afghanistan Philippines Indonesia Singapore Malaysia ORGANIZATIONAL STRUCTURE Associates Membership Leaders AFFILIATED GROUPS MILF KMM Jemaah Islamiah Abu Sayaf FINANCIAL SUPPORT Fund raising Relief organizations Private donors Drug trafficking Money laundry
5 Ontology in Citer Ontology organizes keywords and terms by capturing semantic relationships among the keywords in a specific context Ontology is the basis for the queries search on the targeted network Ontology terms are used to Locate/Gather/Summarize/Filter the harvested documents in a specific framework Citer is a Registered Trademark of MindCite Ltd. Ontology Example Richer relationships Types BT/NT Synonym Type/Type of Related to Reflected in Characteristic of Limitation of Aim of Disadvantage of Objectives of Negotiation Cooperation Weights Terms weigh: Relations weight:
6 Ontology Example Multiple perspectives The Anthrax view 11 Ontology Example Multiple perspectives The Symptoms view 12
7 An Ontology Spectrum What is an Ontology? Catalog/ ID Thesauri narrower term relation Formal is-a Frames General (properties) Logical constraints Terms/ glossary Informal is-a Formal instance Value Restrs. Disjointness, Inverse, partof 13 Deborah L. McGuinness. Ontologies Come of Age. in Dieter Fensel, Jim Hendler, Henry Lieberman, and Wolfgang Wahlster, editors. The Semantic Web: Why, What, and How, MIT Press, סביבת הי יש ום מ ו דל קציר - ספריה דיגיטלית Provider Harvester Identifier News Services Newspapers Other Resources Gatherer Filterer Summarizer Broker Retriever User Collector Broker & Interface User 14
8 סביבת הי יש ום ארכיטקטורת Citer ליבה מקורות מידע מנשק משתמש ניהול Intranet Exchange Office Legacy ג ישה זיהוי Data Bases SQL Server DB2 Oracle תיכנ ו ן איסוף אונתולוגיה סינון אירגון Internet Open sources בקרה תמצות RSS & Forums Secured Sites Citer is a Registered Trademark of MindCite Ltd. סביבת הי יש ום מ ח זו ריות ו תיפעול של Citer מיפתוח קיטלוג אישכול תימצות אינדוקס אירגון איסוף שיטוט מוכוון סינון זיהוי Repository ניווט חיפוש חיפוש מתקדם חיפוש סמנטי קישוריות מקורות מידע מילות מפתח פרופיל משתמש אנתולוגיה עילעול/חיפוש דו"חות מגשי מידע התראות הפצה e-publishing 16
9 האתגר : מרחב עבודה אישי לחוקר ומשתמש קצה ) (Single Point Access 17 כלי חקר במרחב הארגוני גילוי, מיפוי וניתוח פרופיל אישי וארגוני תמצות מידע - על מילון מונחים ארגוני מיפוי ידע סינון ודירוג אונתולוגיה ארגונית קטלוג ומיון ניטור דינמי ניתוח מידע איסוף חיפוש ואחזור 18
10 כל י ח ק ר במר חב האר ג ונ י (Single Point Access) גילוי, מיפוי וניתוח 1 19 כל י ח ק ר במר חב האר ג ונ י (Single Point Access) גילוי, מיפוי וניתוח 2 20
11 כל י ח ק ר במר חב האר ג ונ י (Single Point Access) גילוי, מיפוי וניתוח 3 21 כל י ח ק ר במר חב האר ג ונ י (Single Point Access) גילוי, מיפוי וניתוח 4 22
12 כל י ח ק ר במר חב האר ג ונ י (Single Point Access) גילוי, מיפוי וניתוח 5 23 Semantic Knowledge Map The Semantic Knowledge Map reveals Bulgaria's involvement in weapon/ nuclear materials trafficking, money transactions and laundering 24
13 Merging Link Analysis with Knowledge Discovery 25 Ontology Editor Citer Ontology Editor enables the full mapping & description of all known entities in the system (either from structured or unstructured sources). It provide another dimensional view of the organizational knowledge environment enabling concept exploration and knowledge formulation. 26
14 Entities Extraction Citer Entity Extraction provides automatic extraction of keywords and ontology terms. It enables mapping & description of entities (either from structured or unstructured sources). 27
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