{
  "name": "EBNF",
  "scopeName": "source.ebnf",
  "patterns": [
    {
      "include": "#comment"
    },
    {
      "name": "meta.syntax-rule.ebnf",
      "begin": "\\s*(\\b(?:\\w|\\s|[\\-_0-9])+\\b)\\s*(=)",
      "end": ";",
      "patterns": [
        {
          "include": "#comment"
        },
        {
          "include": "#subrules"
        }
      ],
      "captures": {
        "1": {
          "name": "entity.name.function.ebnf"
        },
        "2": {
          "name": "keyword.operator.definition.ebnf"
        }
      },
      "endCaptures": {
        "0": {
          "name": "punctuation.terminator.syntax-rule.ebnf"
        }
      }
    }
  ],
  "repository": {
    "comment": {
      "name": "comment.block.ebnf",
      "begin": "\\(\\*(?!\\))",
      "end": "\\*\\)"
    },
    "double-quote-string": {
      "name": "string.quoted.double.ebnf",
      "begin": "\"",
      "end": "\""
    },
    "group": {
      "begin": "\\(",
      "end": "\\)",
      "patterns": [
        {
          "include": "#subrules"
        }
      ],
      "beginCaptures": {
        "0": {
          "name": "keyword.other.group.begin.ebnf"
        }
      },
      "endCaptures": {
        "0": {
          "name": "keyword.other.group.end.ebnf"
        }
      }
    },
    "invalid": {
      "name": "invalid.illegal.ebnf",
      "match": "\\(\\s*[*:/]\\s*\\)"
    },
    "non-terminal": {
      "name": "variable.other.non-terminal.ebnf",
      "match": "\\w[\\w\\-_0-9]*\\w"
    },
    "operator": {
      "patterns": [
        {
          "include": "#operator-alternative"
        },
        {
          "include": "#operator-concatenation"
        },
        {
          "include": "#operator-exception"
        }
      ]
    },
    "operator-alternative": {
      "name": "keyword.operator.alternative.ebnf",
      "match": "\\|"
    },
    "operator-concatenation": {
      "name": "keyword.operator.concatenation.ebnf",
      "match": ","
    },
    "operator-exception": {
      "name": "keyword.operator.exception.ebnf",
      "match": "-"
    },
    "optional": {
      "begin": "\\[",
      "end": "\\]",
      "patterns": [
        {
          "include": "#subrules"
        }
      ],
      "beginCaptures": {
        "0": {
          "name": "keyword.other.optional.begin.ebnf"
        }
      },
      "endCaptures": {
        "0": {
          "name": "keyword.other.optional.end.ebnf"
        }
      }
    },
    "repetition": {
      "begin": "{",
      "end": "}",
      "patterns": [
        {
          "include": "#subrules"
        }
      ],
      "beginCaptures": {
        "0": {
          "name": "keyword.other.repetition.begin.ebnf"
        }
      },
      "endCaptures": {
        "0": {
          "name": "keyword.other.repetition.end.ebnf"
        }
      }
    },
    "repetition-numbered": {
      "match": "(\\d+)\\s*(\\*)",
      "captures": {
        "1": {
          "name": "constant.numeric.integer.ebnf"
        },
        "2": {
          "name": "keyword.operator.repetition.ebnf"
        }
      }
    },
    "single-quote-string": {
      "name": "string.quoted.single.ebnf",
      "begin": "'",
      "end": "'"
    },
    "special-sequence": {
      "name": "entity.other.attribute-name.ebnf",
      "begin": "\\?",
      "end": "\\?",
      "beginCaptures": {
        "0": {
          "name": "keyword.other.special-sequence.begin.ebnf"
        }
      },
      "endCaptures": {
        "0": {
          "name": "keyword.other.special-sequence.end.ebnf"
        }
      }
    },
    "subrules": {
      "patterns": [
        {
          "include": "#invalid"
        },
        {
          "include": "#optional"
        },
        {
          "include": "#repetition"
        },
        {
          "include": "#group"
        },
        {
          "include": "#repetition-numbered"
        },
        {
          "include": "#non-terminal"
        },
        {
          "include": "#operator"
        },
        {
          "include": "#single-quote-string"
        },
        {
          "include": "#double-quote-string"
        },
        {
          "include": "#special-sequence"
        }
      ]
    }
  }
}