{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/api-evangelist/nus/refs/heads/main/json-schema/nus-module-schema.json",
  "title": "NUS Module",
  "description": "A full NUS module record as returned by the NUSMods API endpoint /{acadYear}/modules/{moduleCode}.json. Derived from the NUSMods OpenAPI 3.0.1 Module schema.",
  "type": "object",
  "required": [
    "acadYear",
    "description",
    "title",
    "department",
    "faculty",
    "workload",
    "moduleCredit",
    "moduleCode",
    "semesterData"
  ],
  "properties": {
    "acadYear": { "type": "string", "examples": ["2018/2019"] },
    "moduleCode": { "type": "string", "examples": ["CS2100"] },
    "title": { "type": "string", "examples": ["Computer Organisation"] },
    "description": { "type": "string" },
    "moduleCredit": { "type": "string", "examples": ["4"] },
    "department": { "type": "string", "examples": ["Computer Science"] },
    "faculty": { "type": "string", "examples": ["Computing"] },
    "workload": {
      "description": "Either an array of weekly hours per workload component or a free-text description.",
      "oneOf": [
        { "type": "array", "items": { "type": "number" } },
        { "type": "string" }
      ]
    },
    "prerequisite": { "type": "string", "examples": ["CS1010 or its equivalent"] },
    "preclusion": { "type": "string" },
    "corequisite": { "type": "string" },
    "semesterData": {
      "type": "array",
      "items": { "$ref": "#/$defs/SemesterData" }
    }
  },
  "$defs": {
    "SemesterData": {
      "type": "object",
      "required": ["semester"],
      "properties": {
        "semester": { "type": "number", "examples": [1] },
        "examDate": { "type": "string", "format": "date-time" },
        "examDuration": { "type": "number", "examples": [120] },
        "timetable": { "type": "array", "items": { "$ref": "#/$defs/Lesson" } }
      }
    },
    "Lesson": {
      "type": "object",
      "required": ["classNo", "startTime", "endTime", "weeks", "venue", "lessonType"],
      "properties": {
        "classNo": { "type": "string", "examples": ["08"] },
        "startTime": { "type": "string", "examples": ["1100"] },
        "endTime": { "type": "string", "examples": ["1200"] },
        "weeks": {
          "oneOf": [
            { "$ref": "#/$defs/WeekRange" },
            { "type": "array", "items": { "type": "number" } }
          ]
        },
        "venue": { "type": "string", "examples": ["COM1-0208"] },
        "day": { "type": "string", "examples": ["Friday"] },
        "lessonType": { "type": "string", "examples": ["Tutorial"] },
        "size": { "type": "number", "examples": [30] }
      }
    },
    "WeekRange": {
      "type": "object",
      "required": ["start", "end"],
      "properties": {
        "start": { "type": "string", "format": "date" },
        "end": { "type": "string", "format": "date" },
        "weekInterval": { "type": "number", "default": 1 },
        "weeks": { "type": "array", "items": { "type": "number" } }
      }
    }
  }
}