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Coastal Atlas Interoperability - Ontologies

Coastal Atlas Interoperability - Ontologies. Luis Bermudez Stephanie Watson Marine Metadata Interoperability Initiative. 1. Day 1. Preparation. Pre-paration (5 min). Create groups of 2. Every group will have a number (X) Your working ontology will be aX.owl

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Coastal Atlas Interoperability - Ontologies

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  1. Coastal Atlas Interoperability - Ontologies Luis Bermudez Stephanie Watson Marine Metadata Interoperability Initiative 1

  2. Day 1

  3. Preparation

  4. Pre-paration (5 min) • Create groups of 2. • Every group will have a number (X) • Your working ontology will be aX.owl • Example: Group 10 should work on a10.owl • One group will also be the super atlas master group - so they will add resources to this ontology if needed. (more later)

  5. Pre-paration (10 min) • Make sure that: • CMAP works • TopBraidComposer works • You can access the SVN repository

  6. CMAP • tool to create concept maps 54

  7. TopBraidComposer (TBC) • TBC is a tool to develop Semantic Web ontologies and semantic applications in RDF • Walk through the help system and Ch 3. of the tutorial 54

  8. Help in TopBraidComposer • Configuring Help • Click on Help / Help Contents • Click on Search Scope hypertext • Click on New • Give a name e.g. TopBraid • Select TopBraid Composer • Click OKs 1 2 4 3 5

  9. Introduction to Subversion (SVN) • an open source version control system • allows users to keep track of changes made over time to any type of electronic data • typical uses are versioning source code, web pages or design documents • Used in this tutorial to publish ontologies... simulating a distributed environment 55

  10. Check that SVN is Installed in TBC • Window Menu • Show View • Other 56

  11. Should See the SVN Repository Folder

  12. If not, install SVN plugin • Help Menu • Software Updates • Find and Install

  13. Click on “…new features” • Check “subclipse update site” box • Click on “new remote site”

  14. Type URL of the SVN plugin and follow instructions

  15. Create Project from SVN Repository • Window Menu • Show View • Other

  16. Select SVN Repository

  17. A view titled “SVN Repository” should have appeared. • Right click and select: New Repository Location

  18. Type the following URL: https://ont.googlecode.com/svn/trunk/and click on Finish • User: mmidemo • Password: j6x4e4b8

  19. Right click on “ont-coastal” folder • Choose Checkout • “Accept permanently”

  20. Checkout and create a new project, for example, “ont-coastal” • You should have a project with the ontologies available

  21. SVN Operations Explore changes Publish changes Update the files in your local directory

  22. Overview • Goals • Introduction to Ontologies • Ontology Components and Practical Exercise • Advanced Ontology Concepts • Mappings • Restrictions and Description Logic • SPARQL and Rules • MMI Tools • Ontology Engineering • Interoperability Demonstration • Discussions 2

  23. Goals • Gain an understanding of controlled vocabularies (CVs) and ontologies • Hands on experience developing ontologies • Learn enough to write proposal to go further • Have fun 3

  24. Introduction to Ontologies (20 min)Semantic Interoperability Problems • Semantic Interoperability • Controlled Vocabularies • Ontologies, RDF, OWL etc..

  25. Interoperability

  26. Diversity

  27. Making Connections

  28. Confusion

  29. What happens if we are not semantically interoperable ? • We cannot find all the data that we are seeking. • p. 41 of Workshop 1 report: “Terminology used to describe similar data can vary between specialties or regions, which can complicate data searches and data integration.” • We get too many results and they are hard to classify.

  30. Semantic Interoperability Problem: Can’t find all the data

  31. Semantic Interoperability Problem:Information Overload Need Categorizations ...

  32. Agreements on content help solve semantic interoperability problems.Ontologies could be a mechanism

  33. Ontologies facilitate agreement on: • controlled vocabularies • mappings • categories • knowledge of a domain

  34. Controlled Vocabularies (CVs) What are they? • a set of restricted words, used by an information community when describing resources or discovering data; • prevents misspellings and avoids the use of arbitrary, duplicative, or confusing words that cause inconsistencies when cataloging or searching data. • For example: • Glossary, dictionary • Classifications and categories • Relationship categories 15

  35. Examples of CVs in Use SeaDataNet - http://www.seadatanet.org 16

  36. Examples of CVs in Use:Consortium of Universities for the Advancement of Hydrologic Science (CUAHSI) http://www.cuahsi.org 17

  37. Examples of CVs in Use:OGC URN Resolver 18

  38. SOAP WSDL 19

  39. It is not always possible to agree on one and only one vocabulary

  40. Ontologiesfacilitate agreement on: • controlled vocabularies • mappings • categories • knowledge of a domain

  41. Interoperability

  42. Ontologies facilitate agreement on: • controlled vocabularies • mappings • categories (is a type of mapping -:> ) • knowledge of a domain

  43. Categories Example - Oregon Coastal Atlas Example Oregon Atlas 24

  44. Ontologies facilitate agreement on: • controlled vocabularies • mappings • categories • knowledge of a domain

  45. Knowledge Domain Representation 27

  46. OntologiesGood for Expressing Formally: • controlled vocabularies • mappings • categories • knowledge of a domain how ? • formal • machine friendly

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