{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://open-misconceptions.github.io/miscon-data/schema/miscon-record.schema.json",
  "title": "Open Misconceptions record",
  "description": "One misconception in Open Misconceptions. Schema version 0.2 (v0.1.1 release): framework-agnostic alignments, reviews[] with a status lifecycle, computed trust.",
  "type": "object",
  "additionalProperties": false,
  "required": [
    "id",
    "uri",
    "uuid",
    "version",
    "status",
    "title",
    "statement",
    "kind",
    "domain",
    "evidence_patterns",
    "provenance",
    "license"
  ],
  "properties": {
    "$schema": {
      "type": "string",
      "description": "Optional pointer to this schema for editor support."
    },
    "id": {
      "type": "string",
      "pattern": "^[a-z]+(\\.[a-z0-9-]+)+$",
      "description": "Stable, human-readable ID. Lowercase, dot-separated; the first segment is the domain. Never reused."
    },
    "uri": {
      "type": "string",
      "format": "uri",
      "pattern": "^https?://[^/]+(/[^/]+)*/m/[a-z]+(\\.[a-z0-9-]+)+$",
      "description": "Stable URI: base URI + /m/ + id. The base may carry a path (a GitHub Pages project site is <owner>.github.io/<repo>), so the host is not required to be the whole prefix. `miscon validate` pins the exact value against the configured base."
    },
    "uuid": {
      "type": "string",
      "format": "uuid",
      "pattern": "^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$",
      "description": "Opaque identifier, unique across the library. Used as the CASE CFItem identifier."
    },
    "version": {
      "type": "string",
      "pattern": "^[0-9]+\\.[0-9]+\\.[0-9]+$",
      "description": "Semantic version of this record's content. Bump patch for wording, minor for added evidence, major for a changed statement."
    },
    "status": {
      "type": "string",
      "enum": [
        "draft",
        "llm-reviewed",
        "reviewed",
        "deprecated",
        "merged"
      ],
      "description": "Lifecycle: draft -> llm-reviewed -> reviewed -> deprecated | merged. llm-reviewed needs at least one model review with verdict accept covering statement and evidence; reviewed needs at least one human accept or one attested review. merged requires history.merged_into. The validator enforces the review rules."
    },
    "title": {
      "type": "string",
      "minLength": 3,
      "maxLength": 120,
      "description": "Short label for the misconception, a noun phrase."
    },
    "statement": {
      "type": "string",
      "minLength": 10,
      "description": "The belief, stated as the learner would hold it. A belief, not a wrong answer."
    },
    "kind": {
      "type": "string",
      "enum": [
        "overgeneralization",
        "undergeneralization",
        "procedural-bug",
        "notation-confusion",
        "misapplied-analogy"
      ],
      "description": "Mechanism by which the belief arises. A misconception is a belief; a missing prerequisite is an absence, so it is not a kind here -- record the belief the learner holds instead."
    },
    "domain": {
      "type": "string",
      "pattern": "^[a-z]+(\\.[a-z0-9-]+)*$",
      "description": "Subject area, matching the first segment of `id` (e.g. `math`, `prog`). May be qualified (`math.fractions`)."
    },
    "about": {
      "type": "array",
      "description": "Concepts this misconception is about: {scheme, uri, code, note?}. scheme is a free string; known schemes live in schemes/registry.json and the validator warns on unknown ones. Prefer CASE item URIs; use Miscon concept URIs (<base>/c/<id>) only where no CASE URI exists. `code` is required for every scheme but Miscon.",
      "uniqueItems": true,
      "items": {
        "$ref": "#/$defs/alignment"
      }
    },
    "level_band": {
      "type": "array",
      "description": "Education levels where the misconception is typically observed.",
      "items": {
        "type": "string",
        "enum": [
          "early-primary",
          "primary",
          "middle",
          "secondary",
          "upper-secondary",
          "undergraduate",
          "graduate",
          "adult",
          "any"
        ]
      },
      "uniqueItems": true
    },
    "locale": {
      "type": "string",
      "pattern": "^[a-z]{2,3}(-[A-Za-z0-9]{2,8})*$",
      "description": "BCP 47 tag for the language of `statement` and examples. Default `en`."
    },
    "evidence_patterns": {
      "type": "array",
      "minItems": 1,
      "description": "Observable response patterns that indicate the belief. At least one, each with a concrete example.",
      "items": {
        "$ref": "#/$defs/evidence_pattern"
      }
    },
    "discriminators": {
      "type": "object",
      "additionalProperties": false,
      "description": "How to tell this misconception apart from a slip and from its nearest neighbours.",
      "properties": {
        "vs_slip": {
          "type": "string",
          "minLength": 5,
          "description": "What distinguishes a systematic holder of this belief from someone who made a one-off error."
        },
        "vs": {
          "type": "object",
          "description": "Keyed by neighbouring Open Misconceptions id; value explains the observable difference.",
          "propertyNames": {
            "pattern": "^[a-z]+(\\.[a-z0-9-]+)+$"
          },
          "additionalProperties": {
            "type": "string",
            "minLength": 5
          }
        }
      }
    },
    "relations": {
      "type": "object",
      "description": "Typed links. Closed object, decided 2026-09-05: conflicts_with and resolved_by point at Concepts (external URIs, or Miscon concept URIs); confusable_with and specializes point at Open Misconceptions records. confusable_with is symmetric; the validator warns when the reverse edge is missing. The record id/uri is the canonical public ID of the corresponding Knowledge Map Misconception node; there is no second identifier field.",
      "additionalProperties": false,
      "properties": {
        "conflicts_with": {
          "description": "Concepts this belief contradicts.",
          "$ref": "#/$defs/concept_targets"
        },
        "resolved_by": {
          "description": "Concepts whose understanding corrects this belief.",
          "$ref": "#/$defs/concept_targets"
        },
        "confusable_with": {
          "description": "Misconceptions that produce similar evidence and need a discriminator. Symmetric.",
          "$ref": "#/$defs/misconception_targets"
        },
        "specializes": {
          "description": "Broader misconceptions of which this is a special case.",
          "$ref": "#/$defs/misconception_targets"
        }
      }
    },
    "alignments": {
      "type": "array",
      "description": "Links to items in external schemes: {scheme, uri, code, note?}. Framework-agnostic; see schemes/registry.json. Every entry here names an external scheme, so `code` is always required.",
      "items": {
        "$ref": "#/$defs/alignment"
      }
    },
    "provenance": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "sources",
        "origin"
      ],
      "description": "Where this record's claim comes from.",
      "properties": {
        "sources": {
          "type": "array",
          "minItems": 1,
          "items": {
            "$ref": "#/$defs/source"
          }
        },
        "origin": {
          "type": "string",
          "enum": [
            "literature",
            "inventory-import",
            "practitioner",
            "data-mined",
            "llm-drafted"
          ],
          "description": "How the record entered the library. `llm-drafted` records must cite literature in `sources` and stay `draft` until reviewed."
        },
        "notes": {
          "type": "string"
        }
      }
    },
    "prevalence": {
      "type": "object",
      "additionalProperties": false,
      "description": "Reserved for measured prevalence. Out of scope for v1; shape is provisional.",
      "properties": {
        "population": {
          "type": "string"
        },
        "rate": {
          "type": "number",
          "minimum": 0,
          "maximum": 1
        },
        "n": {
          "type": "integer",
          "minimum": 1
        },
        "source": {
          "type": "string"
        }
      }
    },
    "history": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "supersedes": {
          "type": "array",
          "items": {
            "type": "string",
            "pattern": "^[a-z]+(\\.[a-z0-9-]+)+$"
          },
          "uniqueItems": true,
          "description": "Older records this one replaces."
        },
        "merged_into": {
          "type": "string",
          "pattern": "^[a-z]+(\\.[a-z0-9-]+)+$",
          "description": "Required when status is `merged`. The surviving record."
        },
        "deprecated_reason": {
          "type": "string"
        },
        "changelog": {
          "type": "array",
          "items": {
            "type": "object",
            "additionalProperties": false,
            "required": [
              "version",
              "date",
              "change"
            ],
            "properties": {
              "version": {
                "type": "string",
                "pattern": "^[0-9]+\\.[0-9]+\\.[0-9]+$"
              },
              "date": {
                "type": "string",
                "pattern": "^[0-9]{4}-[0-9]{2}-[0-9]{2}$"
              },
              "change": {
                "type": "string"
              }
            }
          }
        }
      }
    },
    "license": {
      "type": "string",
      "const": "CC-BY-4.0",
      "description": "Licence for this record's content. All records are CC BY 4.0."
    },
    "notes": {
      "type": "string",
      "description": "Free text about the record that is not part of the belief itself, e.g. likely origins of the misconception."
    },
    "trust": {
      "type": "string",
      "enum": [
        "low",
        "medium",
        "high"
      ],
      "description": "Computed by `miscon trust` from reviews[] against reviewers/registry.json. Never hand-typed; the validator fails on a stored value that does not match the computed one."
    },
    "reviews": {
      "type": "array",
      "description": "Reviews of this record. Each entry records who reviewed what, when, and with which verdict. Human reviewers carry a durable handle; model reviewers carry a model id and version; attested reviews point at the provenance source that asserts the misconception.",
      "items": {
        "$ref": "#/$defs/review"
      }
    },
    "disputed": {
      "type": "boolean",
      "default": false,
      "description": "True while an open dispute challenges this record. A disputed record stays live and citable; the site and the JSON show the flag and link the issues. Set by a maintainer when a dispute is accepted for ruling; see GOVERNANCE.md."
    },
    "disputes": {
      "type": "array",
      "uniqueItems": true,
      "description": "URLs of dispute issues raised against this record, open or settled. Entries are never removed: a settled dispute stays as part of the record's history.",
      "items": {
        "type": "string",
        "format": "uri",
        "pattern": "^https?://"
      }
    }
  },
  "allOf": [
    {
      "if": {
        "properties": {
          "status": {
            "enum": [
              "reviewed",
              "llm-reviewed"
            ]
          }
        }
      },
      "then": {
        "required": [
          "reviews"
        ],
        "properties": {
          "reviews": {
            "minItems": 1
          }
        }
      }
    },
    {
      "if": {
        "properties": {
          "status": {
            "const": "merged"
          }
        }
      },
      "then": {
        "required": [
          "history"
        ],
        "properties": {
          "history": {
            "required": [
              "merged_into"
            ]
          }
        }
      }
    },
    {
      "if": {
        "properties": {
          "disputed": {
            "const": true
          }
        },
        "required": [
          "disputed"
        ]
      },
      "then": {
        "required": [
          "disputes"
        ],
        "properties": {
          "disputes": {
            "minItems": 1
          }
        }
      }
    }
  ],
  "$defs": {
    "evidence_pattern": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "item_shape",
        "signature",
        "example"
      ],
      "properties": {
        "item_shape": {
          "type": "string",
          "minLength": 3,
          "description": "The kind of task on which the pattern shows (e.g. `add two fractions with unlike denominators`)."
        },
        "signature": {
          "type": "string",
          "minLength": 5,
          "description": "The response rule a holder of the belief follows, stated so a grader could apply it."
        },
        "example": {
          "type": "object",
          "additionalProperties": false,
          "required": [
            "item",
            "expected",
            "response"
          ],
          "properties": {
            "item": {
              "type": "string",
              "minLength": 1,
              "description": "The task as shown to the learner."
            },
            "expected": {
              "type": "string",
              "minLength": 1,
              "description": "The correct response."
            },
            "response": {
              "type": "string",
              "minLength": 1,
              "description": "The response a holder of the belief gives."
            }
          }
        },
        "notes": {
          "type": "string"
        }
      }
    },
    "alignment": {
      "type": "object",
      "additionalProperties": false,
      "description": "A link to an item in some scheme. `code` is required for every external scheme and deliberately not required for the internal `Miscon` scheme; see the `code` description for why.",
      "required": [
        "scheme",
        "uri"
      ],
      "allOf": [
        {
          "$comment": "`code` is mandatory for external schemes. The exemption for `Miscon` is deliberate, not an oversight: see the `code` description below.",
          "if": {
            "required": [
              "scheme"
            ],
            "properties": {
              "scheme": {
                "const": "Miscon"
              }
            }
          },
          "then": true,
          "else": {
            "required": [
              "code"
            ]
          }
        }
      ],
      "properties": {
        "scheme": {
          "type": "string",
          "pattern": "^[A-Za-z][A-Za-z0-9-]*$",
          "description": "Name of the scheme, e.g. CASE, Miscon, CCSS, progmiscon. Free string; not an enum. `Miscon` names this library's own concept URIs and is the one scheme treated as internal."
        },
        "uri": {
          "type": "string",
          "format": "uri",
          "minLength": 1
        },
        "code": {
          "type": "string",
          "minLength": 1,
          "description": "Human-readable code in the scheme (e.g. 5.NF.A.1, Java/AssignCompares). Required for every scheme except `Miscon`. An external scheme's URI can stop resolving without warning -- every CCSS URI this library cites now 404s after corestandards.org was rebuilt -- and when it does, the code is the only part of the alignment a reader can still act on, so it is not allowed to be absent. `Miscon` is exempt because its URI is <base>/c/<concept-id> and the concept ID is itself the code: a separate field would restate it."
        },
        "label": {
          "type": "string"
        },
        "relation": {
          "type": "string",
          "enum": [
            "about",
            "same-as",
            "close-match",
            "conflicts-with"
          ],
          "description": "How this record relates to the item. Default about."
        },
        "note": {
          "type": "string"
        }
      }
    },
    "source": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "type",
        "citation"
      ],
      "properties": {
        "type": {
          "type": "string",
          "enum": [
            "paper",
            "book",
            "inventory",
            "dataset",
            "standard",
            "web",
            "practitioner"
          ]
        },
        "citation": {
          "type": "string",
          "minLength": 5,
          "description": "Human-readable citation."
        },
        "doi": {
          "type": "string",
          "pattern": "^10\\.[0-9]{4,9}/\\S+$"
        },
        "url": {
          "type": "string",
          "format": "uri"
        },
        "identifier": {
          "type": "string",
          "description": "The source's own identifier for this misconception, if any."
        },
        "license": {
          "type": "string",
          "description": "Licence of the source, if text was reused."
        },
        "note": {
          "type": "string"
        }
      }
    },
    "concept_targets": {
      "type": "array",
      "minItems": 1,
      "uniqueItems": true,
      "items": {
        "type": "object",
        "additionalProperties": false,
        "required": [
          "external"
        ],
        "properties": {
          "external": {
            "type": "string",
            "format": "uri",
            "minLength": 1,
            "description": "A CASE item URI, or a Miscon concept URI (<base>/c/<concept-id>), or another external concept URI."
          },
          "label": {
            "type": "string"
          }
        }
      }
    },
    "misconception_targets": {
      "type": "array",
      "minItems": 1,
      "uniqueItems": true,
      "items": {
        "type": "string",
        "pattern": "^[a-z]+(\\.[a-z0-9-]+)+$",
        "description": "An Open Misconceptions record id."
      }
    },
    "review": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "kind",
        "by",
        "date",
        "scope",
        "verdict"
      ],
      "properties": {
        "kind": {
          "type": "string",
          "enum": [
            "human",
            "model",
            "attested"
          ]
        },
        "by": {
          "description": "human: name plus a durable handle, e.g. \"Vikram Maram (github:vikram-learnco)\" or an ORCID. model: model id and version, e.g. claude-fable-5-1. attested: integer index into provenance.sources[] of the source asserting the misconception.",
          "oneOf": [
            {
              "type": "string",
              "minLength": 1
            },
            {
              "type": "integer",
              "minimum": 0
            }
          ]
        },
        "date": {
          "type": "string",
          "format": "date",
          "pattern": "^[0-9]{4}-[0-9]{2}-[0-9]{2}$",
          "description": "For model reviews this pins the model's capability at review time."
        },
        "scope": {
          "type": "array",
          "minItems": 1,
          "uniqueItems": true,
          "items": {
            "type": "string",
            "enum": [
              "statement",
              "evidence",
              "discriminators",
              "sources"
            ]
          }
        },
        "verdict": {
          "type": "string",
          "enum": [
            "accept",
            "revise",
            "reject"
          ]
        },
        "notes": {
          "type": "string"
        }
      },
      "allOf": [
        {
          "if": {
            "properties": {
              "kind": {
                "const": "attested"
              }
            }
          },
          "then": {
            "properties": {
              "by": {
                "type": "integer"
              }
            }
          }
        },
        {
          "if": {
            "properties": {
              "kind": {
                "enum": [
                  "human",
                  "model"
                ]
              }
            }
          },
          "then": {
            "properties": {
              "by": {
                "type": "string"
              }
            }
          }
        }
      ]
    }
  }
}