{
  "clases": [
    {
      "codigo_materia": "MAT101",
      "nombre_materia": "Cálculo I",
      "seccion": "A1",
      "profesor": "Dr. García",
      "creditos": 4,
      "bloques": [
        { "dia": "L", "hora_inicio": "07:00", "hora_fin": "09:00" },
        { "dia": "W", "hora_inicio": "07:00", "hora_fin": "09:00" }
      ]
    },
    {
      "codigo_materia": "MAT101",
      "nombre_materia": "Cálculo I",
      "seccion": "B1",
      "profesor": "Dra. López",
      "creditos": 4,
      "bloques": [
        { "dia": "M", "hora_inicio": "09:00", "hora_fin": "11:00" },
        { "dia": "J", "hora_inicio": "09:00", "hora_fin": "11:00" }
      ]
    },
    {
      "codigo_materia": "FIS101",
      "nombre_materia": "Física I",
      "seccion": "A1",
      "profesor": "Dr. Martínez",
      "creditos": 3,
      "bloques": [
        { "dia": "L", "hora_inicio": "09:00", "hora_fin": "11:00" },
        { "dia": "J", "hora_inicio": "14:00", "hora_fin": "15:00" }
      ]
    },
    {
      "codigo_materia": "FIS101L",
      "nombre_materia": "Laboratorio de Física I",
      "seccion": "L1",
      "profesor": "Ing. Rodríguez",
      "creditos": 1,
      "bloques": [
        { "dia": "V", "hora_inicio": "14:00", "hora_fin": "17:00" }
      ]
    },
    {
      "codigo_materia": "PRG101",
      "nombre_materia": "Programación I",
      "seccion": "C1",
      "profesor": "Ing. Pérez",
      "creditos": 3,
      "bloques": [
        { "dia": "M", "hora_inicio": "14:00", "hora_fin": "16:00" },
        { "dia": "V", "hora_inicio": "10:00", "hora_fin": "12:00" }
      ]
    }
  ],
  "franjas": [
    {
      "tipo": "blocked",
      "dia": "L",
      "hora_inicio": "12:00",
      "hora_fin": "14:00"
    },
    {
      "tipo": "blocked",
      "dia": "W",
      "hora_inicio": "12:00",
      "hora_fin": "14:00"
    }
  ],
  "_comentarios": {
    "bloques": "Cada bloque tiene: dia (L/M/W/J/V/S), hora_inicio (HH:MM), hora_fin (HH:MM)",
    "franjas_tipo": "blocked = franja bloqueada (no programar clases), preferred = franja preferida",
    "dias": "L=Lunes, M=Martes, W=Miércoles, J=Jueves, V=Viernes, S=Sábado",
    "horas": "Formato 24 horas (07:00 - 21:00)"
  }
}