sparql-client examples

gistfile1.txt

require 'sparql/client'
sparql = SPARQL::Client.new("http://dbpedia.org/sparql")
sparql.query("SELECT ?album WHERE { ?album dbp:type 'album'@en ; dbo:artist dbr:The_Beatles . }")

# SELECT * WHERE { ?s ?p ?o } OFFSET 100 LIMIT 10
# query = sparql.select.where([:s, :p, :o]).offset(100).limit(10)
# query.each_solution { |solution| puts solution.inspect }

2.2.4 :055 > query = sparql.select(:album).where([:album, 'dbp:type "album"@en ;', 'dbo:artist dbr:The_Beatles'])
=> #<SPARQL::Client::Query:0x3ff07ce42bd4(SELECT ?album WHERE { ?album dbp:type "album"@en ; "dbo:artist dbr:The_Beatles" . })> 
2.2.4 :056 > query.each_solution { |solution| puts solution.inspect  }
SPARQL::Client::MalformedQuery: Virtuoso 37000 Error SP030: SPARQL compiler, line 1: syntax error at '"dbo:artist dbr:The_Beatles"' before '.'

SPARQL query:
define sql:big-data-const 0 SELECT ?album WHERE { ?album dbp:type "album"@en ; "dbo:artist dbr:The_Beatles" . } Processing query SELECT ?album WHERE { ?album dbp:type "album"@en ; "dbo:artist dbr:The_Beatles" . }
	from /Users/azanella/.rvm/gems/ruby-2.2.4/gems/sparql-client-2.0.0/lib/sparql/client.rb:346:in `block in response'
	from /Users/azanella/.rvm/gems/ruby-2.2.4/gems/sparql-client-2.0.0/lib/sparql/client.rb:687:in `call'
	from /Users/azanella/.rvm/gems/ruby-2.2.4/gems/sparql-client-2.0.0/lib/sparql/client.rb:687:in `block in request'
	from /Users/azanella/.rvm/gems/ruby-2.2.4/gems/sparql-client-2.0.0/lib/sparql/client.rb:683:in `times'
	from /Users/azanella/.rvm/gems/ruby-2.2.4/gems/sparql-client-2.0.0/lib/sparql/client.rb:683:in `request'
	from /Users/azanella/.rvm/gems/ruby-2.2.4/gems/sparql-client-2.0.0/lib/sparql/client.rb:343:in `response'
	from /Users/azanella/.rvm/gems/ruby-2.2.4/gems/sparql-client-2.0.0/lib/sparql/client.rb:304:in `query'
	from /Users/azanella/.rvm/gems/ruby-2.2.4/gems/sparql-client-2.0.0/lib/sparql/client.rb:270:in `block in call_query_method'
	from /Users/azanella/.rvm/gems/ruby-2.2.4/gems/sparql-client-2.0.0/lib/sparql/client/query.rb:411:in `result'
	from /Users/azanella/.rvm/gems/ruby-2.2.4/gems/sparql-client-2.0.0/lib/sparql/client/query.rb:404:in `each_solution'
	from (irb):56
	from /Users/azanella/.rvm/rubies/ruby-2.2.4/bin/irb:11:in `<main>'