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      "title": "Preface",
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    {
      "title": "ML at a Glance",
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      "end_index": 2,
      "nodes": [
        {
          "title": "An ML session",
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          "end_index": 3,
          "node_id": "0002"
        },
        {
          "title": "Types and Values",
          "start_index": 3,
          "end_index": 4,
          "node_id": "0003"
        },
        {
          "title": "Recursive Functions",
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          "end_index": 4,
          "node_id": "0004"
        },
        {
          "title": "Raising Exceptions",
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          "end_index": 5,
          "node_id": "0005"
        },
        {
          "title": "Structures",
          "start_index": 5,
          "end_index": 6,
          "node_id": "0006"
        },
        {
          "title": "Signatures",
          "start_index": 6,
          "end_index": 7,
          "node_id": "0007"
        },
        {
          "title": "Coercive Signature Matching",
          "start_index": 7,
          "end_index": 8,
          "node_id": "0008"
        },
        {
          "title": "Functor Declaration",
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          "end_index": 9,
          "node_id": "0009"
        },
        {
          "title": "Functor Application",
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          "end_index": 9,
          "node_id": "0010"
        },
        {
          "title": "Summary",
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          "end_index": 9,
          "node_id": "0011"
        }
      ],
      "node_id": "0001"
    },
    {
      "title": "Programming with ML Modules",
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      "end_index": 10,
      "nodes": [
        {
          "title": "Introduction",
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          "end_index": 11,
          "node_id": "0013"
        },
        {
          "title": "Signatures",
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          "end_index": 12,
          "node_id": "0014"
        },
        {
          "title": "Structures",
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          "end_index": 13,
          "node_id": "0015"
        },
        {
          "title": "Functors",
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          "end_index": 14,
          "node_id": "0016"
        },
        {
          "title": "Substructures",
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          "end_index": 15,
          "node_id": "0017"
        },
        {
          "title": "Sharing",
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          "end_index": 16,
          "node_id": "0018"
        },
        {
          "title": "Building the System",
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          "node_id": "0019"
        },
        {
          "title": "Separate Compilation",
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          "node_id": "0020"
        },
        {
          "title": "Good Style",
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          "end_index": 18,
          "node_id": "0021"
        },
        {
          "title": "Bad Style",
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          "end_index": 19,
          "node_id": "0022"
        }
      ],
      "node_id": "0012"
    },
    {
      "title": "The Static Semantics of Modules",
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      "end_index": 20,
      "nodes": [
        {
          "title": "Elaboration",
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          "end_index": 21,
          "node_id": "0024"
        },
        {
          "title": "Names",
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          "end_index": 21,
          "node_id": "0025"
        },
        {
          "title": "Decorating Structures",
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          "node_id": "0026"
        },
        {
          "title": "Decorating Signatures",
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          "node_id": "0027"
        },
        {
          "title": "Signature Instantiation",
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          "end_index": 24,
          "node_id": "0028"
        },
        {
          "title": "Signature Matching",
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          "end_index": 25,
          "node_id": "0029"
        },
        {
          "title": "Signature Constraints",
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          "end_index": 25,
          "node_id": "0030"
        },
        {
          "title": "Decorating Functors",
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          "end_index": 26,
          "node_id": "0031"
        },
        {
          "title": "External Sharing",
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          "end_index": 27,
          "node_id": "0032"
        },
        {
          "title": "Functors with Arguments",
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          "end_index": 28,
          "node_id": "0033"
        },
        {
          "title": "Sharing Between Argument and Result",
          "start_index": 28,
          "end_index": 28,
          "node_id": "0034"
        },
        {
          "title": "Explicit Result Signatures",
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          "end_index": 29,
          "node_id": "0035"
        }
      ],
      "node_id": "0023"
    },
    {
      "title": "Implementing an Interpreter in ML",
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      "end_index": 32,
      "nodes": [
        {
          "title": "Version 1: The Bare Typechecker",
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          "end_index": 33,
          "node_id": "0037"
        },
        {
          "title": "Version 2: Adding Lists and Polymorphism",
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          "end_index": 37,
          "node_id": "0038"
        },
        {
          "title": "Version 3: A Different Implementation of Types",
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          "node_id": "0039"
        },
        {
          "title": "Version 4: Introducing Variables and Let",
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          "end_index": 43,
          "node_id": "0040"
        },
        {
          "title": "Acknowledgement",
          "start_index": 43,
          "end_index": 43,
          "node_id": "0041"
        }
      ],
      "node_id": "0036"
    },
    {
      "title": "Appendix A: The Bare Interpreter",
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      "end_index": 44,
      "nodes": [
        {
          "title": "Syntax",
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          "end_index": 44,
          "node_id": "0043"
        },
        {
          "title": "Parsing",
          "start_index": 44,
          "end_index": 45,
          "node_id": "0044"
        },
        {
          "title": "Environments",
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          "end_index": 45,
          "node_id": "0045"
        },
        {
          "title": "Evaluation",
          "start_index": 45,
          "end_index": 46,
          "node_id": "0046"
        },
        {
          "title": "Type Checking",
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          "end_index": 46,
          "node_id": "0047"
        },
        {
          "title": "The Interpreter",
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          "end_index": 47,
          "node_id": "0048"
        },
        {
          "title": "The Evaluator",
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          "end_index": 48,
          "node_id": "0049"
        },
        {
          "title": "The Typechecker",
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          "end_index": 49,
          "node_id": "0050"
        },
        {
          "title": "The Basics",
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          "end_index": 52,
          "node_id": "0051"
        }
      ],
      "node_id": "0042"
    },
    {
      "title": "Appendix B: Files",
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      "end_index": 53,
      "node_id": "0052"
    }
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