Construction of Marine Vocabularies in the Marine Metadata Interoperability Project Luis Bermudez, John Graybeal, MBARI Anthony Isenor, Defence R&D Canada Roy Lowry, BODC Dawn Wright, Oregon State Oceans 2005 Washington D.C.

MMI The Marine Metadata Interoperability (MMI) initiative promotes the exchange, integration and use of marine data through enhanced data publishing, discovery, documentation and accessibility. Community effort.

MMI NSF for major initial funding. SURA, the Southeastern Universities Research Association for major in-kind support (sponsored by ONR, the Office of Naval Research). NOAA Coastal Services Center for bridge funding.

Community Support Roy Lowry, BODC Robert Arko, LDEO Julie Bosch, NOAA Ben Domenico, Unidata Karen Stocks, SDSC Steve Hankin, NOAA - Ocean.US/DMAC Mark Musen, Stanford Univ Michael Parke, Univ of Hawaii Lola Olsen, NASA Goddard Bob Weller, WHOI Dawn Wright, Oregon State Univ John Graybeal, MBARI. PI Philip Bogden, SURA/SCOOP Steering Committee Executive Committee Stephen Miller, Scripps Francisco Chavez, MBARI

MMI Number of pages requested per month

MMI as of Aug 2005 ~ 200 members. > 600 documents available. Is listed in first place in a Google search for "marine metadata”. 8 presentations in one year (e.g. DMAC, NEPTUNE DMAS, OBIS). 10 virtual tutorials given related to marine ontologies, tools and web services. One workshop “Advancing Domain Vocabularies” Aug. 2005, Boulder, CO. Tools: VINE, VOC2OWL, Ontology Web Services and application to query distributed repositories.

“One ocean” Search for sea water temperature data Water Temperature sea_water_ temperature TEMP BODC GCMD CF Only matches

Metadata Data EML ISOADL DCMI FGDC MARINE XML GML ADL NetCDF ASCII ContentContent ProtocolProtocol ESML OPenDAP Rest SOAP Z39.50 DFDL Thredds Community agreements LAS WxS HTTP HDF TIF JPEG

Controlled Vocabulary Formally managed, community-specific terminology that collectively represents a specialized vocabulary for a community. Benefits: –helps to avoid misspellings and avoid the use of arbitrary words that cause inconsistencies, –helps to solve semantic incompatibilities among distributed systems.

Controlled Vocabulary Two types: –Parameter Discovery Vocabulary (PDV) Use to guide the user to find data Examples: GCMD, BODC Discovery, AGU Index Terms –Parameter Usage Vocabulary (PUV) Use to tag the data collected Examples: U.S. JGOFS, BODC, CF

Semantic Interoperability Distributed and heterogeneous systems are able to solve issues related to controlled vocabulary.

Framework to make marine vocabularies interoperable Identification Harmonization Alignment and mapping Publication

Identification Members of the MMI site add a reference to the site. Lists or domain leaders identify the most relevant ones. About 60 vocabularies have been distinguished and are available in the site.

Harmonization DTD CommaSeparatedValues HTML TabSeparatedValues RelationalDatabase XML/XSD RDF OWL

Web Ontology Language OWL 2003 World Wide Web Consortium recommendation to formally express ontologies. Based on the Resource Description Framework (RDF). Can be serialized in XML. Supporting tools: JENA, Protégé, SWOOP, Sesame, Pangloss, Kuwari, VINE, …

Classes and individuals Parameter beam1_velocity wind_speed beam2_echo_intensity Class Looks like a Real world objects Individuals beam1_velocity wind_speed beam2_echo_intensity

Properties

Minimum set of properties

VOC2OWL

~ 60 ontologies are available at

Alignment and mapping Main relations: –Same as (owl:sameAs) Inverse, symmetric and transitive –Narrower Than (map:narrowerThan) Transitive, Inverse of map:broaderThan) –Broader Than (map:broaderThan) Transitive, Inverse of map:narrowerThan)

sameAs relation

“Advancing Domain Vocabularies” MMI workshop Aug 2005

Community Agreements

“One ocean” Search for sea water temperature data Water Temperature sea_water_ temperature TEMP BODC GCMD CF Find all !

Acknowledgements NSF, SURA, ONR, NOAA Our community supporters... The many other key organizations working with us to address metadata interoperability issues: –OceanUS and regional IOOS systems –ORION and its related projects

Thank You marinemetadata.org