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.
| Introduction | 01:28:02 | |
|---|---|---|
| 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 |
| URI and RDF | 01:26:52 | |
|---|---|---|
| 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 |
| RDFS | 01:31:15 | |
|---|---|---|
| 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 |
| SPARQL | 01:34:39 | |
|---|---|---|
| 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 |
| Ontologies | 01:28:06 | |
|---|---|---|
| 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 |
| Logics | 01:25:59 | |
|---|---|---|
| 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 |
| Popositional Logic, First Order Logic and Description Logics | 01:33:45 | |
|---|---|---|
| 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 |
| Description Logics | 01:40:43 | |
|---|---|---|
| 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 |
| RDF(S) Semantics | 01:31:13 | |
|---|---|---|
| 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 |
| OWL - Web Ontology Language | 01:28:20 | |
|---|---|---|
| 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 |
| Rules and the Semantic Web | 01:29:29 | |
|---|---|---|
| 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 |
| Ontological Engineering | 01:35:22 | |
|---|---|---|
| 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 |
| Linked Data Applications | 01:33:16 | |
|---|---|---|
| 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 |
