{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/cetome/dataviz/main/schema/dataviz-file.schema.json",
  "title": "dataviz file",
  "description": "A standard as a graph: items, links, item types and link, filters. Format version 1. Reference: docs/FORMAT.md at https://github.com/cetome/dataviz . The viewer is more lenient than this schema (it fixes what it can and reports it); this schema describes a clean file.",
  "type": "object",
  "required": ["items"],
  "properties": {
    "dataviz": { "const": 1, "description": "Format version." },
    "id": { "type": "string", "pattern": "^[a-z0-9-]+$", "maxLength": 60, "description": "Short name for files, links and browser storage." },
    "title": { "type": "string" },
    "subtitle": { "type": "string" },
    "version": { "type": "string" },
    "date": { "type": "string", "description": "YYYY-MM-DD" },
    "authors": { "type": "string" },
    "url": { "type": "string", "format": "uri" },
    "licence": { "type": "string", "description": "Licence of this file, e.g. CC-BY-4.0." },
    "description": { "type": "string" },
    "layout": { "enum": ["auto", "saved", "hierarchical", "organic", "grid", "circle"], "default": "auto" },
    "direction": { "enum": ["LR", "TB", "RL", "BT"], "default": "LR" },
    "types": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["id"],
        "properties": {
          "id": { "type": "string", "minLength": 1 },
          "label": { "type": "string" },
          "color": { "$ref": "#/$defs/color" },
          "shape": { "enum": ["round-rectangle", "rectangle", "ellipse", "hexagon", "diamond", "triangle", "octagon", "tag", "barrel"], "default": "round-rectangle" },
          "border": { "enum": ["solid", "dashed", "dotted", "double", "none"], "default": "solid" },
          "caption": { "enum": ["id", "title", "both"], "default": "id" },
          "assess": { "enum": ["yes", "no", "auto"], "default": "auto" },
          "description": { "type": "string" }
        }
      }
    },
    "linkTypes": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["id"],
        "properties": {
          "id": { "type": "string", "minLength": 1 },
          "label": { "type": "string" },
          "color": { "$ref": "#/$defs/color" },
          "style": { "enum": ["solid", "dashed", "dotted"], "default": "solid" },
          "arrow": { "enum": ["triangle", "none", "square", "circle", "diamond", "tee", "vee"], "default": "triangle" }
        }
      }
    },
    "filters": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["id", "tags"],
        "properties": {
          "id": { "type": "string", "minLength": 1 },
          "label": { "type": "string" },
          "mode": { "enum": ["any", "all", "none"], "default": "any" },
          "tags": {
            "type": "array",
            "items": {
              "type": "object",
              "required": ["id"],
              "properties": { "id": { "type": "string", "minLength": 1 }, "label": { "type": "string" } }
            }
          }
        }
      }
    },
    "items": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["id"],
        "properties": {
          "id": { "type": "string", "minLength": 1, "description": "Unique among the items." },
          "title": { "type": "string" },
          "type": { "type": "string", "description": "The id of a type." },
          "parent": { "type": "string", "description": "The id of the item containing this one." },
          "tags": { "type": "array", "items": { "type": "string" }, "uniqueItems": true },
          "text": { "type": "string", "description": "Lines are paragraphs; '- ' bullets, **bold**, `code`, [links](https://...)." },
          "label": { "type": "string" },
          "url": { "type": "string", "format": "uri" },
          "x": { "type": "number" },
          "y": { "type": "number" }
        },
        "dependentRequired": { "x": ["y"], "y": ["x"] }
      }
    },
    "links": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["from", "to"],
        "properties": {
          "from": { "type": "string", "minLength": 1 },
          "to": { "type": "string", "minLength": 1 },
          "type": { "type": "string", "description": "The id of a link type." },
          "label": { "type": "string" }
        }
      }
    }
  },
  "$defs": {
    "color": { "type": "string", "pattern": "^#([0-9a-fA-F]{3}|[0-9a-fA-F]{6})$" }
  }
}