158 lines
3.7 KiB
Markdown
158 lines
3.7 KiB
Markdown
<img style="border:0px;" width="64" src="https://json-ld.org/images/json-ld-logo-64.png" alt="JSON-LD-logo-64" align="right"/>
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# JSON-LD.ex
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[](https://travis-ci.org/rdf-elixir/jsonld-ex)
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[](https://hex.pm/packages/json_ld)
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[](https://coveralls.io/github/rdf-elixir/jsonld-ex?branch=master)
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An implementation of the [JSON-LD] standard for Elixir and [RDF.ex].
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## Features
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- fully conforming JSON-LD API processor
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- JSON-LD reader/writer for [RDF.ex]
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- tests of the [JSON-LD test suite][] (see [here](https://github.com/rdf-elixir/jsonld-ex/wiki/JSON-LD.ex-implementation-report) for a detailed status report)
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## TODO
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- remote contexts
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- [JSON-LD Framing]
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- [JSON-LD 1.1] support
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## Installation
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The [JSON-LD.ex](https://hex.pm/packages/json_ld) Hex package can be installed as usual, by adding `json_ld` to your list of dependencies in `mix.exs`:
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```elixir
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def deps do
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[{:json_ld, "~> 0.3"}]
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end
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```
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## Usage
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### Expand a document
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```elixir
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"""
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{
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"@context":
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{
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"name": "http://xmlns.com/foaf/0.1/name",
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"homepage": {
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"@id": "http://xmlns.com/foaf/0.1/homepage",
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"@type": "@id"
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}
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},
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"name": "Manu Sporny",
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"homepage": "http://manu.sporny.org/"
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}
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"""
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|> Jason.decode!
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|> JSON.LD.expand
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```
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produces
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```elixir
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[%{"http://xmlns.com/foaf/0.1/homepage" => [%{"@id" => "http://manu.sporny.org/"}],
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"http://xmlns.com/foaf/0.1/name" => [%{"@value" => "Manu Sporny"}]}]
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```
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### Compact a document
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```elixir
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context = Jason.decode! """
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{
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"@context": {
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"name": "http://xmlns.com/foaf/0.1/name",
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"homepage": {
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"@id": "http://xmlns.com/foaf/0.1/homepage",
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"@type": "@id"
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}
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}
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}
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"""
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"""
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[
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{
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"http://xmlns.com/foaf/0.1/name": [ "Manu Sporny" ],
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"http://xmlns.com/foaf/0.1/homepage": [
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{
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"@id": "http://manu.sporny.org/"
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}
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]
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}
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]
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"""
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|> Jason.decode!
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|> JSON.LD.compact(context)
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```
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produces
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```elixir
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%{"@context" => %{
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"homepage" => %{
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"@id" => "http://xmlns.com/foaf/0.1/homepage",
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"@type" => "@id"},
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"name" => "http://xmlns.com/foaf/0.1/name"
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},
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"homepage" => "http://manu.sporny.org/",
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"name" => "Manu Sporny"}
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```
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## RDF Reader and Writer
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JSON-LD.ex can be used to serialize or deserialize RDF graphs by using it as a RDF.ex reader and writer.
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```elixir
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dataset = JSON.LD.read_file!("file.jsonld")
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JSON.LD.write_file!(dataset, "file.jsonld")
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```
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## Pretty printing
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Pretty printing is possible on all writer functions with all of the formatter options of [Jason](https://hexdocs.pm/jason/Jason.Formatter.html#pretty_print/2), the underlying JSON encoder, to which the given options are passed through.
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```elixir
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JSON.LD.write_file!(dataset, "file.jsonld", pretty: true)
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JSON.LD.write_string(dataset, "file.jsonld", pretty: [indent: "\t"])
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```
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## Getting help
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- [Documentation](http://hexdocs.pm/json_ld)
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- [Google Group](https://groups.google.com/d/forum/rdfex)
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## Contributing
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see [CONTRIBUTING](CONTRIBUTING.md) for details.
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## License and Copyright
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(c) 2017-2020 Marcel Otto. MIT Licensed, see [LICENSE](LICENSE.md) for details.
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[RDF.ex]: https://hex.pm/packages/rdf
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[JSON-LD]: http://www.w3.org/TR/json-ld/ "JSON-LD 1.0"
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[JSON-LD 1.1]: https://json-ld.org/spec/latest/json-ld/ "JSON-LD 1.1"
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[JSON-LD API]: http://www.w3.org/TR/json-ld-api/ "JSON-LD 1.0 Processing Algorithms and API"
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[JSON-LD Framing]: http://json-ld.org/spec/latest/json-ld-framing/
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[JSON-LD test suite]: http://json-ld.org/test-suite/
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