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RejectKaigi2010 - RDF.rb
1.
RDF.rb Fumihiro Kato /
2.
3.
4.
RDF
5.
Standardized Graph Model
6.
RDF Store =
Graph DB
7.
NoSQL
8.
Query
SQL SPARQL DB RDB RDF Store Model Relational Model RDF(Graph)
9.
SPARQL • The RDF
Query Language • SPARQL Endpoint • WebAPI
10.
SELECT * WHERE {
?s ?p ?o . } LIMIT 10
11.
PREFIX dbp-ont: <http://dbpedia.org/ontology/> PREFIX
dbpedia: <http://dbpedia.org/resource/> SELECT * WHERE { ?Person dbp-ont:birthPlace dbpedia:Tokyo ; } LIMIT 100
12.
ActiveRDF
RdfContext Ruby-sesame Reddy Rena RDFObjects Semitar RedLeaf RubyRDF Redland
13.
RDF.rb • Pure Ruby •
UNLICENSE (Public Domain) • CRuby 1.8.7/1.9.x, JRuby 1.4/1.5 • gem install linkeddata
14.
Serialization Formats • N-Triples •
XML • Turtle / N3 • JSON • TRIX • RDFa
15.
Storage Adapter •
Memory • Sesame • DataObjects (SQLite3, PostgreSQL) • RedStore • 4Store • MongoDB • Cassandra • Talis
16.
SPARQL with RDf.rb require
‘sparql/client’ # gem install sparql-client sparql = SPARQL::Client(“http://dbpedia.org/sparql”) # SELECT * WHERE { ?s ?p ?o } LIMIT 10 result = sparql.select.where([:s, :p, :o]).limit(10) result.each do |solution| puts solution.inspect end
17.
• http://rdf.rubyforge.org/ • http://github.com/bendiken/rdf •
public-rdf-ruby@w3.org
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