turtle.rb¶ ↑

turtle.rb is a internal Ruby DSL for quickly generating RDF in the turtle format.

Examples¶ ↑

The following simple document

Turtle.build do

  prefix "http://kimdalsgaard.com/documents/"
  prefix :dc, "http://purl.org/dc/elements/1.1/"

  subject [_, "foo"], [:dc, "title"], "Foo"

end

will produce the following result

@prefix : <http://kimdalsgaard.com/documents/> .
@prefix dc: <http://purl.org/dc/elements/1.1/> .
:foo dc:title "Foo" .

Nested Predicates¶ ↑

Turtle.build do

  prefix "http://kimdalsgaard.com/documents/"
  prefix :dc, "http://purl.org/dc/elements/1.1/"

  subject [_, "foo"] do
    predicate [:dc, "title"], "Foo"
    predicate [:dc, "creator"], "Kim Dalsgaard"
  end        

end

results in

@prefix : <http://kimdalsgaard.com/documents/> .
@prefix dc: <http://purl.org/dc/elements/1.1/> .
:foo
  dc:title "Foo" ;
  dc:creator "Kim Dalsgaard" .

Nested Objects¶ ↑

Turtle.build do

  prefix :foaf, "http://xmlns.com/foaf/0.1/"

  subject ["http://dalsgaardkirk.com#kim"], [:foaf, "knows"]  do
    object ["http://dalsgaardkirk.com#pernille"]
    object ["http://dalsgaardkirk.com#sophus"]
  end

end

results in

@prefix foaf: <http://xmlns.com/foaf/0.1/> .
<http://dalsgaardkirk.com#kim> foaf:knows
    <http://dalsgaardkirk.com#pernille> ,
    <http://dalsgaardkirk.com#sophus> .

Blank Nodes¶ ↑

Turtle.build do

  prefix :foaf, "http://xmlns.com/foaf/0.1/"

  subject _("foo"), a, [:foaf, "Person"]       
  subject _, a, [:foaf, "Person"]       
  subject _, a, [:foaf, "Group"]
  subject :bar, a, [:foaf, "Group"]

end

results in

@prefix foaf: <http://xmlns.com/foaf/0.1/> .
_:foo a foaf:Person .
_:b0 a foaf:Person .
_:b1 a foaf:Group .
_:bar a foaf:Group .