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Seminar Semantic Grid

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Grid, Peer-to-Peer, Web Services. Peer-To-Peer. Dezentral, Direkte Kommunikation. Bspw. File-Sharing 'Community' Gedanke. Web Services ... – PowerPoint PPT presentation

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Title: Seminar Semantic Grid


1
Seminar Semantic Grid
  • WS 2004/05
  • Eberhart, Haase, Schnizler, Staab

2
Agenda
  • Vorstellung
  • Einführung Semantic Grid
  • Themen

3
Vorstellung
  • Dr. Andreas Eberhart
  • Dipl.-Inf. Peter Haase
  • Dipl.-Inform.Wirt Björn Schnizler
  • PD Dr. Steffen Staab

4
Semantic Grid
Was ist Semantic Web? a web of data with
formal semantics that can be processed directly
or indirectly by machines
Was ist das Grid? a hardware and software
infrastructure that provides dependable,
consistent, pervasive, and inexpensive access to
high-end computational capabilities.
5
Was ist The Grid
  • Begriff geprägt durch Ian Foster und Carl
    Kesselman
  • Grid-Bibel The Grid Blueprint for a new
    computing infrastructure
  • Grid in Analogie zum Strom-Netz
  • Plug and Play Energie
  • Grundidee
  • Distributed Computing
  • Parallel Computing

6
Computational Grids
  • Vereinigung verteilter Ressourcen
  • High-end Computers
  • Desktop Computer
  • Informations-Quellen
  • zum Lösen komplexer Probleme
  • Simulation
  • Data-Mining

7
Semantic Web Layers
Entailment of the Implicit
Explicit Semantics
Relational Distributed Data
Data Exchange
8
Semantic Web RDF(S)
  • RDF
  • provides metadata about Web resources
  • commits to small set of modeling primitives
  • resource, property, value
  • has an XML syntax
  • RDF Schema
  • extended set of modeling primitives
  • class, subclassof, type
  • property, subpropertyof
  • domain, range
  • enables definition of a domain vocabulary and
    embedding into an is-a hierarchy

9
Semantic Web Ontologies
  • In its classical sense ontology is a
    philosophical discipline
  • In Computer Science An Ontology is a formal
    and explicit specification of a shared
    conceptualisation of a domain of interest
  • (cf. Tom Gruber 1993)
  • Characteristics
  • Shared understanding of a domain of interest
  • Formal description of the meaning of terms and
    relations
  • Machine executable

10
Ontology Example
Object
cooperatesWith
worksIn
produces
Product
Person
Department
owns
isOwnedBy
Controller
Manager
Software
Hardware
11
Dimensionen des Semantic Web
12
Grid, Peer-to-Peer, Web Services
  • Peer-To-Peer
  • Dezentral, Direkte Kommunikation
  • Bspw. File-Sharing
  • Community Gedanke
  • Web Services
  • Software-Komponenten können über Web-Protokolle
    aufgerufen werden (RPC)
  • Lose Koppelung, SOAP, WSDL, UDDI
  • Grid
  • Abstraktion für das Teilen von Ressourcen
  • Hohe Verfügbarkeit, High-Performance
  • Virtuelle Organisation
  • Trend Kollaboration, Service-Orientation,
    Konvergenz mit Web Technologien

13
Three Layer GRID Abstraction
Knowledge Grid
Control
Information Grid
Data to Knowledge
Computation/Data Grid
14
Knowledge Grid
ServiceDescription
Service Reasoning
Discovery
ArbitraryService
DynamicIntegration
InferencingService
Selection
Composition
Knowledge ExtractionService
Knowledge Discovery /Mining Service
Knowledge IntegrationService
Cata- log
Cata- log
lthtml/gt
Internal Knowledge Sources
Public Sources
Paid Sources
15
Semantic Grid
Anwendungs-Szenarien des Grids Simulation,
Multimedia, Data-Grids, etc
Probleme Architekturen, Dynamik, Heterogenität,
Standards
Mögliche Lösungsansätze Semantische
Technologien und ökonomische Methoden -
Semantische Beschreibung der Ressourcen -
Trust, Security, and Policies im Grid -
Marktliche Koordination der Ressourcen-Allokation
16
Themen
17
Spielregeln
  • Seminar
  • 15 - 20 Seiten Ausarbeitung
  • Ca. 20min Vortrag 10min Diskussion
  • Vorträge in Blöcken im Januar/Februar
  • gilt pro Person
  • Themen können mit max. 2 Personen bearbeitet
    werden

18
Themenvergabe
  • Gleich oder am Anfang des Semesters!

19
Seminar Semantic Grid
Infos- und Anmeldung Ansprechpartner Peter
Haase (haase_at_aifb.uni-karlsruhe.de) Björn
Schnizler (schnizler_at_iw.uni-karlsruhe.de)
Weitere Informationen http//www.aifb.uni-karls
ruhe.de/Lehre/Winter2004-05/SemGrid/
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