{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://github.com/Open-MBEE/OpenSysML/docs/reference/api-json-compact.schema.json",
  "title": "api-json-compact/1",
  "description": "The compact form of the SysML v2 API JSON element array that Convert writes under the convert_compact capability. See api-json-compact.md for the rules that expand it to the element array.",
  "type": "object",
  "required": ["format", "ids", "elementCount", "referenceKeys", "elements"],
  "additionalProperties": false,
  "properties": {
    "format": { "const": "api-json-compact/1" },
    "ids": {
      "description": "The id table. A handle is an index into it.",
      "type": "array",
      "items": { "type": "string" }
    },
    "elementCount": {
      "description": "ids[0 .. elementCount) are the written elements, in order. It never exceeds the table's length.",
      "type": "integer",
      "minimum": 0
    },
    "elementIdsAreIds": {
      "description": "Present only when every element's elementId is its @id, in which case no element writes it.",
      "const": true
    },
    "referenceKeys": {
      "description": "Keys whose references are bare handles. None of them carries a number.",
      "type": "array",
      "items": { "type": "string" },
      "uniqueItems": true
    },
    "elements": {
      "type": "array",
      "items": { "$ref": "#/$defs/element" }
    }
  },
  "$defs": {
    "handle": { "type": "integer", "minimum": 0 },
    "element": {
      "description": "An element: its @type, then its properties. It carries no @id; element i has the id ids[i].",
      "type": "object",
      "required": ["@type"],
      "properties": {
        "@type": { "type": "string" },
        "@id": false
      },
      "additionalProperties": { "$ref": "#/$defs/value" }
    },
    "value": {
      "description": "A property value: a scalar, a bare handle under a reference key, an {\"@id\": handle} or {\"@ref\": name} object, or an array of them.",
      "oneOf": [
        { "type": ["string", "number", "boolean", "null"] },
        { "type": "object", "required": ["@id"], "properties": { "@id": { "$ref": "#/$defs/handle" } }, "additionalProperties": false },
        { "type": "object", "required": ["@ref"], "properties": { "@ref": { "type": "string" } }, "additionalProperties": false },
        { "type": "array", "items": { "$ref": "#/$defs/value" } }
      ]
    }
  }
}