Transcript Application of RDF-OWL in the ESG Ontology

Application of RDF-OWL in the ESG
Ontology
Sylvia Murphy: [email protected]
Julien Chastang: [email protected]
Luca Cinquini: [email protected]
Rocky Dunlap: [email protected]
Ryan O’Kuinghttons: [email protected]
Cecelia DeLuca: [email protected]
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
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 intercomparison 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.
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
Compare
Download
Tools
Metadata Lifecycle
Metadata Lifecycle
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5.
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
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
ASP 2008 Colloquium: Numerical
Techniques for Global Atmospheric Models
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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
Workshop Gateway
http://dycore.ucar.edu/
Table Comparison Interface
Table Comparison Details
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Select model components
Select criteria
Table generated dynamically
Eventually selections can be placed in a user’s saved
workspace
http://dycore.ucar.edu/query/modelComparison.htm
Example Table Results
Search Interface
Example Trackback Page
Questions?