http://kmi.open.ac.uk/events/sssw08/presentations.php - PowerPoint PPT Presentation

1 / 20
About This Presentation
Title:

http://kmi.open.ac.uk/events/sssw08/presentations.php

Description:

Mostly from Europe, a couple from Asia (Japan) and one from US. John Domingue (director) welcomes everybody and warns ... Thursday: Talk Natasha Noy (Stanford) ... – PowerPoint PPT presentation

Number of Views:66
Avg rating:3.0/5.0
Slides: 21
Provided by: ronald139
Category:

less

Transcript and Presenter's Notes

Title: http://kmi.open.ac.uk/events/sssw08/presentations.php


1
SSSW 2008 Summary
  • http//kmi.open.ac.uk/events/sssw08/presentations.
    php
  • rdenaux_at_comp.leeds.ac.uk

2
Sunday Registration Reception
  • Around 50 students
  • Mostly from Europe, a couple from Asia (Japan)
    and one from US.
  • John Domingue (director) welcomes everybody and
    warns about not getting stressed about the
    demanding schedule a lot of theory, but also a
    lot of socializing.

3
Monday Introduction
  • Main goal of SSSW is to train future researches
    who want to enter in the SW area.
  • The socializing part of the school is as
    important as the theory because that is how
    projects start.
  • Overview of what is to come.

4
Monday Ontology Languages for the Semantic Web
  • Theory by Sean Bechhoffer (Manchester)?
  • Reasons to use Ontology Languages
  • Annotation, integration, inference
  • Current languages
  • XML, RDF, RDFS, OWL
  • Semantic Networks, Topic Maps, UML, Description
    Logics, Rules, First Order Logic, Conceptual
    Graphs
  • Analysis of RDF, RDFS and OWL (hint of SKOS)?

5
Monday Pattern Based Ontology Design
  • Aldo Gangemi (Semantic Technology Laboratory,
    Rome)?
  • Capture solutions and best practices of using
    ontologies and OWL into Ontology Design Patterns
    (OPs) and provide tools to make ontology design
    and use easier.
  • Several categories of OPs Content, Presentation,
    Reasoning, Architectural, Logical, Refactoring,
    etc.
  • Special attention to Content Ontology Patterns,
    which can be used to model parts of ontologies
    (e.g. model time, n-ary relations, etc.).
  • http//www.ontologydesignpatterns.org

6
Monday Practice OWL Design Patterns
  • Follow a tutorial using OWL in Protégé 4
  • Try to predict and explain OWL reasoning results
  • http//owl.cs.manchester.ac.uk/2008/07/sssw
  • Use TopBraid to build an ontology
  • following Extreme Ontology Design method
    (pair-based modelling, test-oriented)?
  • Reuse library of common design patterns to create
    ontology.
  • Plugin for Protege available, but P4 doesn't
    currently support SPARQL querying (so no
    test-oriented development).

7
Monday Poster Sessions
  • Every student has to present a poster
  • Only two sessions, so you can have a look at half
    of the other student's work
  • Good mix of interests Semantic Web Services (and
    frameworks), Natural Language Processing,
    Ontology design and use support.

8
Tuesday Invited Talk by Guus Schreiber
  • Experiences of using SW technologies in the area
    of Cultural Heritage and Demo.
  • Cultural Heritage domain already provides vast
    amounts of metadata. The main problem becomes
    converting the plain metadata into semantic
    metadata
  • Reach syntactic interoperability SKOS
  • Align metadata schema Dublin Core, OWL
    Subproperties
  • Enrich metadata most time consuming, information
    extraction from plain metadata.
  • Align the vocabularies semantic alignment

9
Tuesday Ontology Matching and Alignment
  • Jérôme Euzenat (INRIA, France)?
  • Main concepts Correspondence, Alignment,
    Matching, Generation
  • Applications Ontology evolution, P2P information
    sharing, Agent communication, Web services
    composition, etc.
  • Match based on entity name, structure,
    extension(how ontology is used), semantics,
    background knowledge
  • Examples edit-distance, Wordnet
  • Different ways to combine matchers to improve
    resulting alignment
  • http//oaei.ontologymatching.org/

10
Tuesday Ontological Engineering
  • Asunción Gómez Pérez (Universidad Politécnica de
    Madrid)?
  • Extensive documentation based on deliverables for
    NeOn project
  • Based on Software Engineering (resembles RUP in
    complexity)?
  • Extensive glossary of activities, workflows (e.g.
    how to reengineer non ontological resources),
    life cycles, decision trees for selecting
    activities, templates for requirement gathering,
    ontology specification, etc.

11
Tuesday Practice
  • Ontology Matching Alignment
  • Practice using APIs and services
  • http//alignapi.gforge.inria.fr/
  • http//scarlet.open.ac.uk/
  • Ontological Engineering
  • Follow Neon Methodology to create an ontology
  • Write specification based on a textual
    description
  • Build ontology using Watson plug-in (reuse
    concepts and relationships found on the internet).

12
Wednesday Talk by Marc Greaves (Vulcan Inc.)?
  • Background information about US Computer Science
    funding, especially DARPA
  • US SW DARPA's DAML Program 45M over 5 years
  • After DARPA (2005) no research follow-up, but
    lots of start-ups and commercial use. Emphasis on
    Databases with SW
  • In EU Large Public Sector Investments, RD
    Institutes(DERI and STI), Emphasis on Social and
    Web.
  • SW has evolved from a machine web, through
    enterprise integration to current Web 2.0
    user-centric.
  • Next step LarKC (EC Framework 7 Program), make
    SW as scalable as possible.

13
Wednesday SW Technologies for Capturing, Sharing
and Reusing Knowledge
  • Fabio Ciravegna (Sheffield)?
  • Main goal is to share knowledge (acquisition and
    capture are only prerequisites)?
  • Ontology-based annotation use an ontology UI
    knowledge source to add semantic annotation (e.g.
    AktiveMedia)?
  • Automatic Techniques Named Entity Recognition,
    Terminology Recognition (Linguistic, Statistical,
    Distance based approaches), Table Field
    Extraction, Event modelling (IE hits a
    performance ceiling 60/70 Precision/Recall ratio
    since 1998)?
  • K-Search provide hybrid search (keyword
    semantics)?

14
Wednesday Semantic Web Services Approaches and
Applications
  • John Domingue (KMI, Open University)?
  • WSMO Use ontologies for describing WS
    Non-functional (QoS, version), capabilities(functi
    onal description), choreography(grounding),
    orchestration(composition).
  • Mediators take care of integration. Provide links
    between one or more source components and a
    target component (e.g. ontologies and WS, WS and
    goals, two WS, etc.). Mediators use Mediation
    Services.
  • Architecture Presentation, SWS, WS, Legacy
    Systems.
  • IRS3 SWS Broker. Variants of WSMO (WSMO-Lite,
    SAWSDL, MicroWSMO)?

15
Wednesday Talk by Chris Welty (IBM Research)?
  • Ontologies and Folksonomies False Friends
  • Tags don't have semantics (e.g. Red has different
    meanings in Spanish or English).
  • Brief overview of Classifications, Ontologies,
    Folksonomies
  • Folksonomies are not Ontologies (even though
    Ontology is used for a wide variety of models).

16
Wednesday Practice
  • Annotate websites using AktiveMedia (semi
    automatic annotation).
  • Use annotations to perform hybrid search in
    K-Search.

17
Thursday Talk Natasha Noy (Stanford)?
  • Community-based Ontology Development
  • Different ways to collaborate depend on Ontology
    size, Community size, Control mechanisms,
    Discussion tools, Synchronization mechanisms.
  • Tool requirements support discussion and
    reaching consensus, provide context (record
    discussions and changes), provenance and trust,
    personalized views, personal and shared spaces,
    access control, user roles, flexible workflow
    support. (Collaborative Protégé)?
  • NCBO BioPortal repository of ontologies,
    terminologies and thesauri in biomedicine.
    Ontologies described by metadata (ontology
    assessment). Community-based evaluation. Support
    for ontology mapping. http//alpha.bioontology.or
    g/

18
Thursday Practice
  • Use WSMO-Studio, IRS-III server and browser
    provided ontologies and legacy methods (in Lisp
    dialect) to create SWS. Domain was European
    travel.

19
Friday Talk by Enrico Motta (KMI, Open
University)?
  • First part is an overview of what the next
    generation of SW is about dynamic, distributed,
    scalable, handling variable quality of data.
    Watson search engine and how it is used in Power
    Aqua
  • Second part is on automatically summarizing
    ontologies. People can say what the key concepts
    in an ontology are. Helpful for ontology
    evaluation and reuse.
  • Algorithm based on Density of concepts(global and
    local density measures), natural categories,
    coverage of isa hierarchy. Evaluation gives mean
    of 42.5 matches with human experts' summary.
  • Algorithm v2 based on evaluation results (people
    don't use coverage much, but use popularity of
    term). 63.61.

20
Mini-project
  • Groups of 4 or 5 students. Choose a SW-related
    topic and work out a project (available time is
    Thursday afternoon and most of Friday until 8
    pm). Present the project in 10 minutes on
    Saturday morning. Projects evaluated on technical
    soundness, feasibility, presentation,
    originality, amount of work done.
  • -iService human computation using SWS
  • -Mapping NL to Ontology Design Patterns
Write a Comment
User Comments (0)
About PowerShow.com