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Lecture-Feed of Series: Semantic Web Technologien (WS 2013/14) Feed of Series: Semantic Web Technologien (WS 2013/14)

Semantic Web Technologien (WS 2013/14)

Dr. Harald Sack

Successor of this series: Semantic Web Technologies (WT 2014/15)

Predecessor of this series: Semantic Web Technologien (WS 2012/13)

Das Web ist heute schon längst zum festen Bestandteil unseres täglichen Lebens geworden. Doch was haben wir außer einer gigantischen und unsortierten Flut von Informationen gewonnen? Wir alle kennen das Problem: Suchen wir nach einer bestimmten Information, werden wir von einer Lawine unnötiger und nicht relevanter Information erschlagen und das Herauspicken der wirklich wichtigen Details gestaltet sich als langwieriger und aufwändiger Prozess.

Semantic Web Technologien bieten mit Hilfe formaler interoperabler Metadatenstandards einen möglichen Ausweg aus diesem Dilemma. Grundgedanke dabei ist es, die Bedeutung der Web-Inhalte mit Hilfe geeigneter Wissensrepräsentationstechniken zu formalisieren und zu annotieren. Dadurch wird deren Semantik nicht nur maschinenlesbar, sondern maschinenverstehbar. Neue Fakten können aus vorhandenen Informationen gewonnen werden und automatisch von einer Vielzahl neuer Anwendungen automatisch kombiniert und genutzt werden.

Einführung

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Date: 15.10.2013
Lang.: de
Dur.: 01:28:02
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• Introduction 00:21:48
• From ARPANET to the Web today 00:16:46
• Quo Vadis WWW 00:07:38
• Syntax, Semantics, Context 00:16:21
• The Web of Data 00:16:48
• Semantic Web Applications 00:08:41

Semantic Web Basic Architecture

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Date: 23.10.2013
Lang.: de
Dur.: 01:26:52
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• Semantic Web - Basic Architecture 00:11:07
• Uniform Resource Identifier 00:17:24
• Resource Description Framework 00:16:04
• RDF Representations 00:18:00
• RDF Lists, Container, Collections 00:10:04
• RDF Reification 00:14:13
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Date: 29.10.2013
Lang.: en
Dur.: 01:31:15
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• What about the Meaning 00:05:07
• Why RDFSchema 00:20:19
• Example 00:20:21
• Semantic Annotation in the Web 00:16:01
• Difference between source and about 00:16:14
• Microdata 00:10:00
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Date: 06.11.2013
Lang.: de
Dur.: 01:34:39
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• Rückblick 00:05:52
• Query Language SPARQL 00:08:09
• SPARQL 1.0 00:17:42
• Filter 00:11:48
• Negation 00:08:05
• SPARQL Result Format 00:09:41
• SPARQL 1.1 00:11:10
• Property Parts 00:22:12

Knowledge Representation and Logics

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Date: 19.11.2013
Lang.: en
Dur.: 01:28:06
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• The (Semantic) World according to lecture 1-4 00:10:03
• What is Knowledge 00:10:33
• Ontology in Classic Greak Philosophy 00:21:03
• Ontology in Late Antiquity and Early Middle Age 00:11:03
• Ontology in the Age of Enlightment 00:10:21
• The Concept of Ontology in Computer Science 00:13:11
• First Order Logic 00:11:52
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Date: 27.11.2013
Lang.: de
Dur.: 01:25:59
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• Ontology Types and Categories 00:15:23
• Ontologies as Interptretation of Reality 00:07:23
• Recapitulation: Propositional Logic and First Order Logic 00:14:53
• Foundations of Logic 00:11:42
• How Logic Works 00:15:25
• First Order Logic 00:13:44
• FOL - Model-theoretic Semantics 00:07:29
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Date: 03.12.2013
Lang.: de
Dur.: 01:33:45
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• Wiederholung 00:14:29
• 1. Negation Normal Form 00:17:17
• Resulotion 00:12:39
• Example 00:21:22
• Properties of FOL 00:04:14
• Description Logics Overview 00:11:39
• ALC - Syntax and Semantic 00:12:05
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Date: 10.12.2013
Lang.: de
Dur.: 01:40:43
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• ALC - Syntax und Semantic 00:20:45
• Open and Closed World Assumption 00:16:18
• Description Logics and Inference 00:17:21
• Reduction to Unsatisfiability 00:10:16
• Tableaux Algorithm 00:18:23
• Tableaux Algorithm 2 00:17:40
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Date: 17.12.2013
Lang.: de
Dur.: 01:31:13
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• Wiederholung 00:11:50
• RDFS Semantics 00:08:11
• Model-theoretic semantics for RDF(S) 00:12:02
• RDF-Interpretations 00:34:56
• Syntactic Reasoning with Deduction Rules 00:10:25
• Deduction Rules for RDFS Enrtailment 00:13:48
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Date: 07.01.2014
Lang.: de
Dur.: 01:28:20
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• Introduction 00:04:45
• Why OWL? 00:15:42
• Classes, Properties and Individuals 00:15:57
• Closed Classes 00:14:19
• OWL - Property Relationships 00:14:44
• Property Inc. 00:13:46
• OWL Profiles 00:09:07
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Date: 14.01.2014
Lang.: de
Dur.: 01:29:29
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• Wiederholung OWL 00:08:16
• Using SPARQL with OWL Knowledge Bases 00:12:14
• The Role of Rules 00:08:17
• Variants of FOL Rules 00:20:07
• SWRL - Abstract Knowledge Definition 00:13:14
• Description Logic Rules 00:14:39
• Forcing DL-Safety 00:12:42

Applications in the "Web of Data"

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Date: 21.01.2014
Lang.: de
Dur.: 01:35:22
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• Wiederholung Regeln 00:05:47
• Knowledge Management 00:11:47
• Methodologies of Ontology Design 00:15:44
• Method of Uschold and King 00:13:23
• Ontology Development Process 00:09:22
• Unified Process for Ontology Building 00:18:24
• Ontology Learning 00:20:55
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Date: 28.01.2014
Lang.: de
Dur.: 01:33:16
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• Wiederholung 00:02:41
• Linked Data Engineering 00:12:55
• Linked Data at Work 00:18:30
• Semantic Search 00:10:00
• How to use Semantic Metadata for Retrieval 00:29:16
• Exploratory Search 00:12:09
• Anwendungsbeispiele 00:19:54
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