Application of RDF-OWL in the ESG Ontology

sounderslipInternet and Web Development

Oct 22, 2013 (3 years and 11 months ago)

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Application of RDF
-
OWL in the ESG
Ontology

Sylvia Murphy:
murphys@ucar.edu

Julien Chastang:

chastang@ucar.edu

Luca Cinquini:
luca@ucar.edu

Rocky Dunlap:
rocky@cc.gatech.edu

Ryan O’Kuinghttons:
rokuingh@ucar.edu

Cecelia DeLuca:
cdeluca@ucar.edu


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 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.


Earth System Modeling Infrastructure (ESMI)

ESMF data structures
and standardized
interfaces

Interoperability

Tools

Workflow

Metadata

XML

Web services

System
Configuration

Database

Search/Browse

Compare

Download

CMOR and other tools

Metadata Lifecycle

Metadata Lifecycle

1.
ESMF component exports XML metadata

2.
The XML is validated and harvested into a Java object
representation

3.
The Java objects are persisted to a relational database
(RDBMS)

4.
Metadata in the RDBMS is then harvested into RDF


a
Semantic Web ontology language

5.
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




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


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?