JSON-LD: JSON for the Social Web

JSON-LD: JSON for the Social Web

• 1.
  JSON-LD JSON for theSocial Web Gregg Kellogg [email protected] @gkellogg Wednesday, August 7, 13
• 2.
  Introducing JSON-LD JSON-based syntaxto express linked data @context @id @type @value @language @graph @list @set Wednesday, August 7, 13
• 3.
  { "@context": "http://json-ld.org/contexts/person", "@id": "http://greggkellogg.net/foaf#me", "@type":"Person", "name": "Gregg Kellogg", "knows": "http://www.markus-lanthaler.com/" } •Make full use of JSON syntactic representations • Object defines a node definition Language Principles • Define referenced node definition with chaining { "@context": "http://json-ld.org/contexts/person", "@id": "http://greggkellogg.net/foaf#me", "@type": "Person", "name": "Gregg Kellogg", "knows": { "@id": "http://www.markus-lanthaler.com/", "@type": "Person", "name": "Markus Lanthaler", "knows" "http://greggkellogg.net/foaf#me" } } Wednesday, August 7, 13
• 4.
  { "@id": "http://greggkellogg.net/foaf#me", "@type": "http://schema.org/Person", "http://schema.org/name":"Gregg Kellogg", "http://schema.org/knows": { "@id": "http://www.markus-lanthaler.com/" } } • Define terms to use short property names • Associate types for property values { "@context": "http://json-ld.org/contexts/person", "id": "http://greggkellogg.net/foaf#me", "type": "Person", "name": "Gregg Kellogg", "knows": "http://www.markus-lanthaler.com/" } { "@context": { "@vocab": "http://schema.org/", "knows”: {"@type": "@id"}, "id”: "@id", "type”: "@type" } } Language Principles Wednesday, August 7, 13
• 5.
  • Define referencednode definition with chaining { "@context": "http://json-ld.org/contexts/person", "@id": "http://greggkellogg.net/foaf#me", "@type": "Person", "name": "Gregg Kellogg", "knows": { "@id": "http://www.markus-lanthaler.com/", "@type": "Person", "name": "Markus Lanthaler", "knows" "http://greggkellogg.net/foaf#me" } } { "@context": "http://json-ld.org/contexts/person", "@graph": [{ "@id": "http://greggkellogg.net/foaf#me", "@type": "Person", "name": "Gregg Kellogg", "knows": "http://www.markus-lanthaler.com/" }, { "@id": "http://www.markus-lanthaler.com/", "@type": "Person", "name": "Markus Lanthaler", "knows" "http://greggkellogg.net/foaf#me" }] } Wednesday, August 7, 13
• 6.
  • More featuresdefined in the syntax specification*: • Ordered Lists, Compact IRIs, Unlabeled Nodes, Reverse Properties, Language Maps, Data Indexing • Embedded @context definitions • Datasets/Named Graphs * http://www.w3.org/TR/json-ld/ Language Principles Wednesday, August 7, 13
• 7.
  It’s just JSON {    "verb":  "post",    "published":  "2011-­‐02-­‐10T15:04:55Z",    "language":  "en",    "actor":  {        "objectType":  "person",        "id":  "urn:example:person:marCn",        "displayName":  "MarCn  Smith",        "url":  "hGp://example.org/marCn",        "image":  {            "url":  "hGp://example.org/marCn/image.jpg",            "mediaType":  "image/jpeg",            "width":  250,            "height":  250        }    },    "object"  :  {        "objectType":  "arCcle",        "id":  "urn:example:blog:abc123/xyz",        "url":  "hGp://example.org/blog/2011/02/entry",        "displayName":  "Why  I  love  AcCvity  Streams"    },    "target"  :  {        "objectType":  "blog",        "id":  "urn:example:blog:abc123",        "displayName":  "MarCn's  Blog",        "url":  "hGp://example.org/blog/"    } } • Express structured data using regular JSON idioms. • Use external @context to alias terms and cast types Wednesday, August 7, 13
• 8.
  RDF  { "@context": "http://json-ld.org/contexts/person", "@id":"http://greggkellogg.net/foaf#me", "@type": "Person", "name": "Gregg Kellogg", "knows": { "@id": "http://www.markus-lanthaler.com/", "@type": "Person", "name": "Markus Lanthaler", "knows" "http://greggkellogg.net/foaf#me" } } Wednesday, August 7, 13
• 9.
  RDF  { "@context": "http://json-ld.org/contexts/person", "@id":"http://greggkellogg.net/foaf#me", "@type": "Person", "name": "Gregg Kellogg", "knows": { "@id": "http://www.markus-lanthaler.com/", "@type": "Person", "name": "Markus Lanthaler", "knows" "http://greggkellogg.net/foaf#me" } } Wednesday, August 7, 13
• 10.
  RDF  { "@context": "http://json-ld.org/contexts/person", "@id":"http://greggkellogg.net/foaf#me", "@type": "Person", "name": "Gregg Kellogg", "knows": { "@id": "http://www.markus-lanthaler.com/", "@type": "Person", "name": "Markus Lanthaler", "knows" "http://greggkellogg.net/foaf#me" } } @prefix: schema <http://schema.org/> . <http://greggkellogg.net/foaf#me> a schema:Person; schema:name “Gregg Kellogg”; shema:knows <http://www.markus-lanthaler.com/> . <http://www.markus-lanthaler.com/> a schema:Person schema:name “Markus Lanthaler” schema:knows <http://greggkellogg.net/foaf#me> . Wednesday, August 7, 13
• 11.
  More Information json-ld.org w3c JavaScript Ruby Python Java PHP Gregg Kellogg @gkellogg [email protected] http://greggkellogg.net/ http://www.slideshare.net/gkellogg1/open-social2013 Wednesday,August 7, 13