Did anyone tried a JSON-LD Processor with a real data source, eg. DBpedia? this is what i got when using the ruby gem: https://github.com/gkellogg/json-ld could not achieve that with javascript (https://github.com/digitalbazaar/jsonld.js) yet.. is there any best practice to deal with a real data source in combination with JSON-LD?

jsonld.rb

require 'rubygems'
require 'json/ld'
require 'net/http'

context = {
  "foaf" => "http://xmlns.com/foaf/0.1/",
  "dbo" => "http://dbpedia.org/ontology/",
  "xsd" => "http://www.w3.org/2001/XMLSchema#",

  "name" => {
    "@id" => "foaf:name",
    "@type" => ""
  },
  "born"=> {
    "@type" => "xsd:date",
    "@id"=> "dbo:birthDate"
  },
  "thumb" => "dbo:thumbnail",
  "homepage" => "foaf:homepage"
}

id = "http://dbpedia.org/resource/Jim_Carrey"
response = Net::HTTP.get_response("dbpedia.org","/sparql?default-graph-uri=http%3A%2F%2Fdbpedia.org&query=DESCRIBE+%3Chttp://dbpedia.org/resource/Jim_Carrey%3E&output=application%2Fld%2Bjson")
input = JSON.parse response.body
input = input["@id"]

compact = JSON::LD::API.compact(input, context)

jim_carrey = compact["@graph"].detect do |resource|
  resource["@id"] == id
end

puts jim_carrey["name"] # {"@language"=>"en", "@value"=>"Jim Carrey"}
puts jim_carrey["born"].first # 1962-01-17
puts jim_carrey["thumb"]
puts jim_carrey["homepage"]


# getting his movies
movies = compact["@graph"].map do |resource|
  resource["@id"] if resource["dbo:starring"] == id
end

puts "---------------------------"
puts "Jim Carrey Movies:"
puts movies.compact!

DBpedia already supports JSON-LD and AFAICT it's completely compliant to the latest version of JSON-LD. Here's the JSON-LD representation of Jim Carrey.

Unfortunately content negotiation doesn't work yet. Thanks for bringing this to my attention @lpsBetty. I'm already in contact with the people that run DBpedia to fix that.

thank you guys for replying!

i have already tried to compact with JSON-LD output, but it didn't worked as expected because i got the code wrong.. now i've got it right with a little bit guessing !?! , see updated gist ..

so i've updated the gist again with my own context!

and i now detect the resource of jim carrey and then print it out.. is this the right way to achieve this?

Good news.. DBpedia has been fixed. So as long as you set the right Accept headers and follow the redirect you get the data directly. You can try it with curl:

curl -LH "Accept: application/ld+json" http://dbpedia.org/resource/Jim_Carrey

I'll leave the rest to @gkellogg as he's the Ruby expert.

oh ok cool! thank you, maybe i'm gonna now try something in javascript ;)