Not working

[bhuga]

This is not working for me with either REXML or Nokogiri:

repo1 = RDF::Repository.new
repo1 << RDF::Statement.new([example.a, example.prop, example.b])
RDF::Writer.open('./out.trix', :format => :trix) do | writer |
  repo1.each_statement do | statement | 
    writer << statement
  end
end

Gives:
ArgumentError: Node.replace requires a Node argument, and cannot accept a Document.
(You probably want to select a node from the Document with at() or search(), or create a new Node via Node.new().)

from /opt/local/lib/ruby/gems/1.8/gems/nokogiri-1.4.1/lib/nokogiri/xml/node.rb:724:in `verify_nodeishness'
from /opt/local/lib/ruby/gems/1.8/gems/nokogiri-1.4.1/lib/nokogiri/xml/node.rb:240:in `<<'
from /opt/local/lib/ruby/gems/1.8/gems/rdf-trix-0.0.3/lib/rdf/trix/writer.rb:174:in `format_triple'

And:
RDF::Writer.for(:trix).new(File.open('./out.trix','w'), :library => :rexml) do | writer |
repo1.each_statement do | statement |
writer << statement
end
end

Gives:

NoMethodError: undefined method `parent=' for nil:NilClass
from /opt/local/lib/ruby/1.8/rexml/parent.rb:19:in `<<'
from /opt/local/lib/ruby/gems/1.8/gems/rdf-trix-0.0.3/lib/rdf/trix/writer.rb:174:in `format_triple'
from /opt/local/lib/ruby/gems/1.8/gems/rdf-trix-0.0.3/lib/rdf/trix/writer/rexml.rb:88:in `call'
from /opt/local/lib/ruby/gems/1.8/gems/rdf-trix-0.0.3/lib/rdf/trix/writer/rexml.rb:88:in `create_element'

[bhuga]

The statements here are wrong, but the problem persists, nonetheless:

?> dc = RDF::DC
=> RDF::Vocabularyhttp:purlorgdcterms 
>> z = RDF::Statement.new :subject => dc.author, :predicate => dc.title, :object => dc.creator, :context => RDF::OWL.sameas
=> #<RDF::Statement:0xc640a8(<http://purl.org/dc/terms/author> <http://purl.org/dc/terms/title> <http://purl.org/dc/terms/creator> .)>
>> r = RDF::Repository.new
=> #<RDF::Repository:0x18c3ed4 @data=[], @title=nil, @uri=nil, @options={}>
>> r << z
=> #<RDF::Repository:0x18c3ed4 @data=[#<RDF::Statement:0xc60d0e(<http://purl.org/dc/terms/author> http:purlorgdctermstitle http:purlorgdctermscreator ], titlenil, urinil, options{}
>> RDF::Writer.for(:trix).new(File.open('./out.trix','w'), :library => :rexml) do | writer |
?> repo1.each_statement do | statement | writer << statement end end
NoMethodError: undefined method `parent=' for nil:NilClass
from /opt/local/lib/ruby/1.8/rexml/parent.rb:19:in `<<'
from /opt/local/lib/ruby/gems/1.8/gems/rdf-trix-0.0.3/lib/rdf/trix/writer.rb:174:in `format_triple'
from /opt/local/lib/ruby/gems/1.8/gems/rdf-trix-0.0.3/lib/rdf/trix/writer/rexml.rb:88:in `call'

And with nokogiri:

?> z
=> #<RDF::Statement:0xc640a8(<http://purl.org/dc/terms/author> <http://purl.org/dc/terms/title> <http://purl.org/dc/terms/creator> .)>
>> RDF::Writer.for(:trix).new(File.open('./out.trix','w')) do | writer |
?> repo1.each_statement do | statement | writer << statement end end
ArgumentError: Node.replace requires a Node argument, and cannot accept a Document.
(You probably want to select a node from the Document with at() or search(), or create a new Node via Node.new().)

from /opt/local/lib/ruby/gems/1.8/gems/nokogiri-1.4.1/lib/nokogiri/xml/node.rb:724:in `verify_nodeishness'
from /opt/local/lib/ruby/gems/1.8/gems/nokogiri-1.4.1/lib/nokogiri/xml/node.rb:240:in `<<'
from /opt/local/lib/ruby/gems/1.8/gems/rdf-trix-0.0.3/lib/rdf/trix/writer.rb:174:in `format_triple'

(Why isn't there a preview button here?!)

[bhuga]

When I grow a brain and use the right repo, it works. I will try and track down the 'no context URL' issue.