Update playground for YAML-LD

[gkellogg]

Two things for this:

• jsonld.js should either be updated or have a shim for handling application/ld+yaml media type and transforming JSON to/from YAML.
• the playground should allow options to specify input and/or output encodings for YAML-LD, also for Context and Frame.
  • as a bonus, allow Turtle/TriG input/output for appropriate algorithms using rdfjs.

[gkellogg]

Thoughts on this:

• The "JSON-LD Input" tab might be a drop-down to select alternative formats. (Might suggest similar formats for the Context, Frame, and Output areas.
  • Note that processing could always be YAML, which handles JSON input as well.
  • The same mechanism could be used for selecting other RDF inputs, or RDF outputs in the N-Quads tab case.
• Codemirror and linting additions for YAML might be a lot of work
• Selecting input format might also select different example inputs
  • Alternatively, could be auto-generated from JSON using YAML library.

[westurner]

[Codemirror + YAML-LD]

• https://codemirror.net/5/mode/yaml/
• YAML language support codemirror/dev#306
  • "@id": "<uri>" works fine
• https://github.com/codemirror/codemirror5/blob/master/mode/yaml/yaml.js
• https://github.com/codemirror/codemirror5/blob/master/addon/lint/yaml-lint.js
  • https://github.com/nodeca/js-yaml
    • https://github.com/nodeca/js-yaml/search?q=simd
    • https://github.com/simdjson/simdjson
• https://github.com/json-ld/json-ld.org/blob/main/playground/index.html
• https://github.com/json-ld/json-ld.org/blob/main/playground/playground.js
• https://github.com/json-ld/json-ld.org/blob/main/playground/jsonld-turtle.js#L112
  • jsonld.turtle
  • jsonld.yamlld
• https://github.com/json-ld/json-ld.org/blob/main/playground/playground.js#L486

  mode: 'yaml' // codemirror mode
  mode: 'yamlld'  // someday codemirror mode if necessary for $context and $id like in the YAML-LD UCR doc?