Dave Blodgett (Lead)
Janice Gordon (Presenter)
"Semantic Web" Web of Data Data Web Web 3.0 Linked Data Web...
Compare/contrast Generic and semantic web.
Generic Web = Document web for humans to read and understand. ex. Wikipedia.
Semantic Web = Data Web for machine understanding ex DBPedia.
Linked Open Data: Same as linked data but under a public license
Why Semantic Web?
Data is of greater value than documents.
Facilitates changes without changing "code lists"
Reference distributed data.
Works well with relational databases
For publishing and linking data.
Everything represented by URI "triple" "My dog has a name and its gus"
Playing a video: http://semanticweb.com/drs-wood-seuss-explain-rdf-in-two-minutes_b25336
Many of the examples based on this video.
Going through an example of RDF.
a = attributes: For embedding semantic (RDF) data in a web document.
Looks at a use case: Best Buy.
Shows how semantic technologies have been incorporated into their web site.
A form of classification for terminology.
Uses the example of a music ontology.
A standard way to represent ontologies in RDF.
Uses an example of AGROVOC, agriculural vocabulary: http://www.fao.org/agrovoc/
Shows the SKOS encoded as RDF/XML representation of Maize
A schema or syntax language for RDF.
Allows creation of parent child relationships in RDF.
Extends RDFS to handle inference.
relationships, cardinality, typing, characteristics, enumerations.
Allows the use of reasoning engines to infer new data.
Shows example using deeper definition of "hasSibling"
Query language for RDF data.
Can query local data or SPARQL endpoints (web services)
Shows simple sparql example.
Shows three tiered data/semantic/application architecture.
Shows D2R server architecture that helps mix relational and semantic databases.
Uses example of BBC 2010 World Cup site as an example. http://www.bbc.co.uk/blogs/bbcinternet/2010/07/bbc_world_cup_2010_dynamic_sem.html
USGS standpoint, how do we move forward?
References Tim Berner-Lee's 5 star rating. http://inkdroid.org/journal/2010/06/04/the-5-stars-of-open-linked-data/
Question about publishing requirements within USGS: Probably need some changes in thinking of what it means to publish data.
Comment about the Marine Metadata Inventory: http://marinemetadata.org/semanticframework