JSON

• Parsing JSON is a Minefield

• orangeduck/json2c: Convert JSON to C data literals

• mikechambers/as3corelib: An ActionScript 3 Library that contains a number of classes and utilities for working with ActionScript? 3. These include classes for MD5 and SHA 1 hashing, Image encoders, and JSON serialization as well as general String, Number and Date APIs.

• The Workbench: JSON Compression : Transpose & Binary

Parser

• We released simdjson 0.3: the fastest JSON parser in the world is even better! – Daniel Lemire's blog - Simdjson 0.3: Faster JSON parser | Hacker News

JSON path

• RFC 6901 - JavaScript Object Notation (JSON) Pointer

• xpath

• nemtsov/json-mask: Tiny language and engine for selecting specific parts of a JS object, hiding the rest.

JSON query and field selection

• nemtsov/json-mask: Tiny language and engine for selecting specific parts of a JS object, hiding the rest.

• jq (see Tools)

• RFC 6901: JavaScript Object Notation (JSON) Pointer - JSON pointer (used by JSON schema)

• JSON Path

  • JSONPath Online Evaluator

  • JSONPath - XPath for JSON

  • How to perform partial object serialization providing "paths" using Newtonsoft JSON.NET - Stack Overflow

• Queries and Mutations | GraphQL

• Facebook (Social) Graph API fields:

  • Fields - API Graph

  • Field Expansion - API Graph

  • ?metadata=1 to get all available fields

  • https://graph.facebook.com/me?fields=id,name,albums.limit(5){name,photos.limit(2).after(MTAyMTE1OTQwNDc2MDAxNDkZD){name,picture.width(100).height(100).as(picture_small),picture.width(720).height(720).as(picture_large),tags.limit(2)}},posts.limit(5),adaccounts{campaigns{adsets{ads{insights.time_range({'since':'2020-05-01','until':'2020-05-01'}){adset_id,campaign_id,ad_id,clicks}}}}}

  • act_2222222/insights?fields=unique_actions,actions&level=account&time_ranges=[{since:'2020-06-12',until:'2020-06-12'}]

  • see Facebook Graph API Explorer

• Retrieve selected fields from a search | Elasticsearch Guide [8.6] | Elastic - Elasticsearch fields selection

JSON schema

Media type with schema application/json;schema="http://example.com/my-hyper-schema#. See JSON Schema: A Media Type for Describing JSON Documents It's possible to use Link header with rel parameter instead. See JSON Schema: A Media Type for Describing JSON Documents

There is not inherance, but a validation rule (more like interfaces):

"allOf": [
	{
		"$ref": "#/definitions/some-object"
	},
	{
		"type": "object",
		"properties": {
			"specific-property": {
				"type": "number"
			}
		}
	}
]

• Explain why inheritance isn't the right model · Issue #148 · json-schema-org/json-schema-org.github.io

Can be used to edit (with a dedicated UI) JSON and validate again a schema it with:

• JSON Editor Online - view, edit and format JSON online

JSON Schema editors and validators:

• JSON Schema Validator - Newtonsoft

• JSON Schema validation online

• korzio/djv: Dynamic JSON Schema Validator - Supports draft-04/06 - RunKit + npm: djv

• Ajv - Another JSON Schema Validator - RunKit + npm: ajv

  1. open RunKit + npm: ajv

  2. past the following code in the playground textarea

  3. fill it

  4. then "run" (button below the textarea)

  5. see the result

  const Ajv = require('ajv');
  const ajv = new Ajv({allErrors: true});
  ajv.addMetaSchema(require('ajv/lib/refs/json-schema-draft-06.json'));
  
  function test(data) {
    const valid = validate(data);
    if (valid){
  	console.log('Valid!');
    }
    else{
  	console.log('Invalid: ' + ajv.errorsText(validate.errors));
    }
  }
  
  const schema ={
    /* the content of CEDDL Schema */
  };
  
  const digitalData = {
    /* your digitalData here */
  };
  
  const validate = ajv.compile(schema);
  test(digitalData);

• ebdrup/json-schema-benchmark: Benchmarks for Node.js JSON-schema validators

Documentation:

• Specification

• JSON Schema

• Understanding JSON Schema — Understanding JSON Schema 7.0 documentation

• JSON Schema Store - List of common JSON Schema

• JSON Schema - For JSON Schema Draft 4 and below

• jdorn/json-editor: JSON Schema Based Editor

See also

• JSchema

Data generator from schema:

• Fake your JSON-Schemas! - json-schema-faker/json-schema-faker: JSON-Schema + fake data generators

• Online JSON Schema Validator and Generator

• andreineculau/json-schema-random: Given a JSON Schema, provide a random valid instance

• jonahkagan/schematic-ipsum: A simple service that generates fake JSON data in accordance with a JSON Schema

• Humanstate/json-schema-tojson: Convert JSON Schema definitions to "fake" JSON structures for emulation and testing

Related formats

• ndjson/ndjson-spec: Specification - Newline delimited JSON

Binary data

Base64, Base92, etc.

// Get list of available chars inside string that use 1 byte (last code point usable in UTF-8 is 0x7F https://en.wikipedia.org/wiki/UTF-8, ASCII 7bits only) and doesn't require JSON encoding
JSON.parse(JSON.stringify(String.fromCharCode(...Array.from({length: 0x7F + 1}, (value, index) => index))).replace(/\\(u[0-9a-z]{4,}|.)/gi, ""))

// Encode integer to include it in JSON string in first UTF-8 byte
function encode(value){
	value = Math.max(value, 0);// only unsigned value
	const charset = " !#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[]^_`abcdefghijklmnopqrstuvwxyz{|}~";
	const radix = charset.length;

	let s = "";
	do {
		s = charset.charAt(value % radix) + s;
		value = Math.floor(value / radix);
	} while(value >= 1)

	return s;
}

function decode (value) {
	// const charset = " !#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[]^_`abcdefghijklmnopqrstuvwxyz{|}~"
	const charset = "!#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[]^_`abcdefghijklmnopqrstuvwxyz{|}~";
	const radix = charset.length;

	let n = 0;
	for(let index = 0, length = value.length; index < length; index++){
		n += charset.indexOf(value.charAt(index)) * radix ** (length - 1 - index);
	}
	return n;
}

Comments

Comment syntax does not exist in JSON (like /* ... */ or // ...). Use a field for that, which could start with $, @, #, //, etc.

You should not use duplicated keys. It's could be supported by parser/writer but it's not standard.

Format used by JSON Schema:

{
	"$comment": "comment line 1\ncomment line 2"
}

• Comment in JSON I removed comment from JSON because I saw people were usin...

• standards - Does JSON syntax allow duplicate keys in an object? - Stack Overflow

• javascript - Can I comment a JSON file? - Stack Overflow

• seriot.ch - Parsing JSON is a Minefield 💣

Tools

• CLI jq

  • stedolan/jq: Command-line JSON processor

  • Extracting objects recursively with jq | Simon Willison’s TILs

• antonmedv/fx: Command-line tool and terminal JSON viewer 🔥

• Editor | JSON Crack - node / graph viewer