{
  "$schema": "https://etalii.net/adp/fbl/schema/0.1/fbl.schema.json#/$defs/Document",
  "fbl": "0.1",
  "doc": "The causal loop diagram's .cld body (definitions/diagrams/causal-loop-diagram.dis, causal-loop-diagram.md): the lines family. One statement per line; the words after a link's arrow come in any order, so they are bound as words of one group; a renamed variable is rewritten in every link and loop that names it.",
  "bindings": {
    "cld": {
      "title": "Causal loop diagram",
      "claims": { "extensions": [".cld"], "origins": ["systems/causal-loop-diagram"] },
      "body": { "kind": "file", "family": "lines" },
      "reader": "declared",
      "text": { "newline": "crlf", "finalNewline": true },
      "header": { "line": "^causal-loop(\\s|$)" },
      "comment": "^\\s*#",
      "unmatched": "report",
      "elements": [
        {
          "name": "variable",
          "type": "Variable",
          "line": "^variable\\s+(?<name>[^\\s\"]+)(?:\\s+\"(?<label>[^\"]*)\")?\\s*$",
          "id": { "from": { "group": "name" } },
          "attributes": {
            "name": { "group": "name", "empty": "refuse", "reference": { "to": ["variable"], "by": "name" } },
            "label": { "group": "label", "empty": "remove" }
          },
          "insert": { "place": "after-last", "emit": "variable {name}[ \"{label}\"]" },
          "remove": { "cascade": ["link"] }
        },
        {
          "name": "loop",
          "type": "Loop",
          "line": "^loop\\s+(?<identifier>[^\\s\"]+)\\s+\"(?<title>[^\"]*)\"(?<members>(?:\\s+[^\\s\"]+)+)\\s*$",
          "attributes": {
            "identifier": { "group": "identifier", "empty": "refuse" },
            "title": { "group": "title", "empty": "keep" },
            "members": { "group": "members", "reference": { "to": ["variable"], "by": "name" } }
          },
          "insert": { "place": "after-last", "emit": "loop {identifier} \"{title}\" {members}" },
          "remove": {}
        }
      ],
      "relations": [
        {
          "name": "link",
          "type": "CausalLink",
          "line": "^link\\s+(?<from>[^\\s\"]+)\\s+->\\s+(?<to>[^\\s\"]+)(?<tail>(?:\\s+(?:\"[^\"]*\"|[^\\s\"]+))*)\\s*$",
          "source": { "group": "from" },
          "target": { "group": "to" },
          "attributes": {
            "polarity": { "group": "tail", "word": "^[+\\-so]$", "map": { "+": "positive", "s": "positive", "-": "negative", "o": "negative" } },
            "delayed": { "group": "tail", "word": "^delayed$", "flag": true },
            "flipped": { "group": "tail", "word": "^flipped$", "flag": true },
            "weight": { "group": "tail", "word": "^weight=(?<value>.+)$", "number": "shortest", "empty": "remove" },
            "note": { "group": "tail", "word": "^\".*\"$", "empty": "remove" }
          },
          "insert": {
            "place": "after-last",
            "emit": "link {source} -> {target}[ {polarity}][ {delayed}][ {flipped}][ weight={weight}][ \"{note}\"]"
          },
          "remove": {}
        }
      ],
      "template": {
        "text": "causal-loop 1\r\n\r\n# One statement per line: variable, link, loop.\r\nvariable a \"A\"\r\nvariable b \"B\"\r\n\r\nlink a -> b +\r\n"
      }
    }
  }
}