Application of RDFOWL in the ESG Ontology

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Application of RDF-OWL in the ESG Ontology

• Sylvia Murphy murphys_at_ucar.edu
• Julien Chastang chastang_at_ucar.edu
• Luca Cinquini luca_at_ucar.edu
• Rocky Dunlap rocky_at_cc.gatech.edu
• Ryan OKuinghttons rokuingh_at_ucar.edu
• Cecelia DeLuca cdeluca_at_ucar.edu

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Outline

• Curator and ESMF in the context of an Earth
  System Modeling Infrastructure
• Metadata lifecycle
• Use of RDF
• Curator and ESG support to a NCAR summer 2008
  colloquium on atmospheric dynamical cores
• RDF in action (demonstration)
• How to search for dynamical cores
• How to look at models, simulations, and
  experiments
• How to create a comparison table

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What is Curator

• The Earth System Curator project, in partnership
  with NCAR initiatives and the Earth System Grid
  (ESG), has built a prototype web portal that
  links model components and data together via
  metadata.
• The portal
• enables model components, models, simulations,
  experiments, and data to be searched and browsed
  (using ESG faceted search)
• provides new tools to support model and component
  inter-comparison projects
• implements dataset trackback - connecting
  datasets with detailed information about the
  models used to create the data
• Curator partners include NCAR, Georgia Tech,
  GFDL, MIT, and members of the European model
  metadata community.

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Earth System Modeling Infrastructure (ESMI)
CMOR and other tools
Metadata
ESMF data structures and standardized interfaces
XML
Interoperability
Database
Workflow
Web services
Search/Browse
System Configuration
Tools
Compare
Download
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Metadata Lifecycle
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Metadata Lifecycle

• ESMF component exports XML metadata
• The XML is validated and harvested into a Java
  object representation
• The Java objects are persisted to a relational
  database (RDBMS)
• Metadata in the RDBMS is then harvested into RDF
  a Semantic Web ontology language
• The RDF is accessed by the ESG web portal for
  faceted search of the metadata

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Application of RDF OWL

• RDF allows for the creation of relationships
  between properties
• Formed in triples
• (Model_Component_X, hasConservationType, Total
  Energy)
• (Model_Component_Y, hasContact, Sylvia Murphy)
• System allows for multiple properties per object,
  which is useful in describing unconfigured model
  components
• Specific relationships were developed
  collaboratively with the scientists who needed
  them

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ASP 2008 Colloquium Numerical Techniques for
Global Atmospheric Models

• 9 atmospheric dynamical core components
• Running 22 test cases at up to 5 resolutions
• Component comparison table
• Automated upload of simulation data, publishing,
  and comparison
• Current PCMDI tables are static, hard-coded,
  non-searchable
• Data search and browse via ESG Gateway

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Workshop Gateway http//dycore.ucar.edu/
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Table Comparison Interface
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Table Comparison Details

• Select model components
• Select criteria
• Table generated dynamically
• Eventually selections can be placed in a users
  saved workspace

http//dycore.ucar.edu/query/modelComparison.htm
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Example Table Results
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Search Interface
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Example Trackback Page
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Questions?