jsonld
JSON for Linking Data
JSON-LD is a light-weight syntax for expressing linked data. It is primarily intended for web-based programming environments, interoperable web services and for storing linked data in JSON-based databases. This package provides bindings to the JavaScript library for converting, expanding and compacting JSON-LD documents.
Hello World
Example from https://github.com/digitalbazaar/jsonld.js#quick-examples. Example data:
doc <- '{
"http://schema.org/name": "Manu Sporny",
"http://schema.org/url": {"@id": "http://manu.sporny.org/"},
"http://schema.org/image": {"@id": "http://manu.sporny.org/images/manu.png"}
}'
context <- '{
"name": "http://schema.org/name",
"homepage": {"@id": "http://schema.org/url", "@type": "@id"},
"image": {"@id": "http://schema.org/image", "@type": "@id"}
}'Compact and expand:
(out <- jsonld_compact(doc, context)){
"@context": {
"name": "http://schema.org/name",
"homepage": {
"@id": "http://schema.org/url",
"@type": "@id"
},
"image": {
"@id": "http://schema.org/image",
"@type": "@id"
}
},
"image": "http://manu.sporny.org/images/manu.png",
"name": "Manu Sporny",
"homepage": "http://manu.sporny.org/"
}
(expanded <- jsonld_expand(out))[
{
"http://schema.org/url": [
{
"@id": "http://manu.sporny.org/"
}
],
"http://schema.org/image": [
{
"@id": "http://manu.sporny.org/images/manu.png"
}
],
"http://schema.org/name": [
{
"@value": "Manu Sporny"
}
]
}
]
Convert between JSON and RDF:
cat(nquads <- jsonld_to_rdf(doc))_:b0 <http://schema.org/image> <http://manu.sporny.org/images/manu.png> .
_:b0 <http://schema.org/name> "Manu Sporny" .
_:b0 <http://schema.org/url> <http://manu.sporny.org/> .
jsonld_from_rdf(nquads)[
{
"@id": "_:b0",
"http://schema.org/image": [
{
"@id": "http://manu.sporny.org/images/manu.png"
}
],
"http://schema.org/name": [
{
"@value": "Manu Sporny"
}
],
"http://schema.org/url": [
{
"@id": "http://manu.sporny.org/"
}
]
}
]
Other utilities:
jsonld_flatten(doc)[
{
"@id": "_:b0",
"http://schema.org/image": [
{
"@id": "http://manu.sporny.org/images/manu.png"
}
],
"http://schema.org/name": [
{
"@value": "Manu Sporny"
}
],
"http://schema.org/url": [
{
"@id": "http://manu.sporny.org/"
}
]
}
]
cat(jsonld_normalize(doc, algorithm = 'URDNA2015', format = 'application/nquads'))_:c14n0 <http://schema.org/image> <http://manu.sporny.org/images/manu.png> .
_:c14n0 <http://schema.org/name> "Manu Sporny" .
_:c14n0 <http://schema.org/url> <http://manu.sporny.org/> .