CODEWITHSUNDEEP
parsingjson-ld
kael
kael

Reputation: 325

JSON-LD Frame: framed object properties as term only (not as IRI)

I'm learning how to use JSON-LD frames using Node jsonld.js, and I'm wondering why some properties are labeled as IRI whereas others are labeled as terms, and I can't see no obvious reason for that difference.

Here's the sample.

For example, in that sample, the name property is labeled as expected, whereas in other cases it's labeled as http://www.schema.org/name, same with url and http://www.schema.org/url; and I can't figure out why:

{
  "@context": "https://schema.org/docs/jsonldcontext.json",
  "@graph": [
    {
      "id": "_:b0",
      "type": "MusicRecording",
      "byArtist": {
        "id": "_:b1",
        "type": "http://www.schema.org/MusicGroup",
        "http://www.schema.org/name": "Snoop Dogg",
        "http://www.schema.org/sameAs": "/Snoop-Dogg/"
      },
      "name": "Paper'd Up",
      "schema:sameAs": "/Snoop-Dogg/Paper%27d-Up/",
      "url": "../Snoop-Dogg/Paper%27d-Up/",
      "http://www.schema.org/duration": "PT3M55S",
      "http://www.schema.org/image": "/static/track_images_200/lr1734_2009720_1372375126.jpg",
      "http://www.schema.org/inAlbum": {
        "id": "_:b2",
        "type": "http://www.schema.org/MusicAlbum",
        "http://www.schema.org/albumRelease": {
          "id": "_:b4",
          "type": "http://www.schema.org/MusicRelease",
          "http://www.schema.org/datePublished": "2001",
          "http://www.schema.org/recordLabel": "Priority"
        },
        "http://www.schema.org/name": "Paid the Cost to Be the Bo$$"
      },
      "http://www.schema.org/producer": {
        "id": "_:b3",
        "type": "http://www.schema.org/Person",
        "http://www.schema.org/name": "Fredwreck",
        "http://www.schema.org/sameAs": "/Fredwreck/",
        "http://www.schema.org/url": {
          "id": "../Fredwreck/"
        }
      },
      "http://www.schema.org/thumbnailUrl": {
        "id": "../static/track_images_100/mr1734_2009720_1372375126.jpg"
      }
    }
  ]
}

How to retrieve the tree with properties named as type instead of IRI (using jsonld.js)?

Upvotes: 1

Views: 359

Answers (1)

Gregg Kellogg
Gregg Kellogg

Reputation: 1906

It's necessary that the term match the IRI you use for the property. For example, schema.org defines name as http://schema.org/name. In your example, you have http://www.schema.org/name.

There are also several places where values which should be IRIs (URLs) are treated as text, for this you want to use something like "http://schema.org/image": {"@id": "/static/track_images_200/lr1734_2009720_1372375126.jpg"}

Part of term selection looks to be sure that a value matches the appropriate @type definition within the context. For example, image is set to {"@type": "@id"}, so it will only match things that look like that.

Here's an updated example on the playground.

Upvotes: 2

Related Questions