A database compiled by me of UNESCO Broad Groups and Fields of Education. This can be useful for you to create your own knowledge-based tag system https://uis.unesco.org/sites/default/files/documents/international-standard-classification-of-education-isced-2011-en.pdf

isced_db.json

[
  {
    "index": "0",
    "name": "General programmes",
    "fieldsOfEducation": [
      {
        "index": "01",
        "name": "Basic programmes",
        "subjects": [
          "Basic general programmes pre-primary",
          "Elementary",
          "Primary",
          "Secondary"
        ]
      },
      {
        "index": "08",
        "name": "Literacy and numeracy",
        "subjects": [
          "Simple and functional literacy",
          "Numeracy"
        ]
      },
      {
        "index": "09",
        "name": "Personal development",
        "subjects": [
          "Enhancing personal skills",
          "Behavioral capacities",
          "Mental skills",
          "Personal organizational capacities",
          "Life orientation programmes"
        ]
      }
    ]
  },
  {
    "index": "1",
    "name": "Education",
    "fieldsOfEducation": [
      {
        "index": "14",
        "name": "Teacher training and education science",
        "subjects": [
          "Teacher training for pre-school",
          "Kindergarten",
          "Elementary school",
          "Vocational",
          "Practical",
          "Non-vocational subject",
          "Adult education",
          "Teacher trainers and for handicapped children General and specialized teacher-training programmesEducation science",
          "Curriculum development in non-vocational and vocational subjects Educational assessment",
          "Testing and measurement",
          "Educational research",
          "Other education science"
        ]
      }
    ]
  },
  {
    "index": "2",
    "name": "Humanities and arts",
    "fieldsOfEducation": [
      {
        "index": "21",
        "name": "Arts",
        "subjects": [
          "Fine arts",
          "Drawing",
          "Painting",
          "Sculpture",
          "Performing arts",
          "Music",
          "Drama",
          "Dance",
          "Circus",
          "Graphic and audio-visual arts",
          "Photography",
          "Cinematography",
          "Music production",
          "Radio and television production",
          "Printing and publishing",
          "Design",
          "Craft skills"
        ]
      },
      {
        "index": "22",
        "name": "Humanities",
        "subjects": [
          "Religion and theology",
          "Foreign languages and cultures",
          "Living or ‘dead’ languages and their literature",
          "Area studies",
          "Native languages",
          "Current or vernacular language and its literature",
          "Other humanities",
          "Interpretation and translation",
          "Linguistics",
          "Comparative literature",
          "History",
          "Archaeology",
          "Philosophy",
          "Ethics"
        ]
      }
    ]
  },
  {
    "index": "3",
    "name": "Social sciences, business and law",
    "fieldsOfEducation": [
      {
        "index": "31",
        "name": "Social and behavioral science",
        "subjects": [
          "Economics",
          "Economic history",
          "Political science",
          "Sociology",
          "Demography",
          "Anthropology",
          "Peace and conflict studies",
          "Human rights"
        ]
      },
      {
        "index": "32",
        "name": "Journalism and information",
        "subjects": [
          "Journalism",
          "Library technician and science",
          "Technicians in museums and similar repositories",
          "Documentation techniques",
          "Archival sciences"
        ]
      },
      {
        "index": "34",
        "name": "Business and administration",
        "subjects": [
          "Retailing",
          "Marketing",
          "Sales",
          "Public relations",
          "Real estate",
          "Finance",
          "Banking",
          "Insurance",
          "Investment analysis",
          "Accounting",
          "Auditing",
          "Bookkeeping",
          "Management",
          "Public administration",
          "Institutional administration",
          "Personnel administration",
          "Secretarial and office work"
        ]
      },
      {
        "index": "38",
        "name": "Law",
        "subjects": [
          "Local magistrates",
          "‘notaires’",
          "Law",
          "Jurisprudence",
          "History of law"
        ]
      }
    ]
  },
  {
    "index": "4",
    "name": "Science",
    "fieldsOfEducation": [
      {
        "index": "42",
        "name": "Life sciences",
        "subjects": [
          "Biology",
          "Botany",
          "Bacteriology",
          "Toxicology",
          "Microbiology",
          "Zoology",
          "Entomology",
          "Ornithology",
          "Genetics",
          "Biochemistry",
          "Biophysics"
        ]
      },
      {
        "index": "44",
        "name": "Physical sciences",
        "subjects": [
          "Astronomy and space sciences",
          "Physics",
          "Other allied subjects",
          "Chemistry",
          "Geology",
          "Geophysics",
          "Mineralogy",
          "Physical anthropology",
          "Physical geography and other geo sciences",
          "Meteorology and other atmospheric sciences including climatic research",
          "Marine science",
          "Vulcanology",
          "Palaeoecology"
        ]
      },
      {
        "index": "46",
        "name": "Mathematics and statistics",
        "subjects": [
          "Mathematics",
          "Operations research",
          "Numerical analysis",
          "Actuarial science",
          "Statistics"
        ]
      },
      {
        "index": "48",
        "name": "Computing",
        "subjects": [
          "Computer sciences",
          "System design",
          "Computer programming",
          "Data processing",
          "Networks",
          "Operating systems"
        ]
      }
    ]
  },
  {
    "index": "5",
    "name": "Engineering, manufacturing and construction",
    "fieldsOfEducation": [
      {
        "index": "52",
        "name": "Engineering and engineering trades",
        "subjects": [
          "Engineering drawing",
          "Mechanics",
          "Metal work",
          "Electricity",
          "Electronics",
          "Telecommunications",
          "Energy and chemical engineering",
          "Vehicle maintenance"
        ]
      },
      {
        "index": "54",
        "name": "Manufacturing and processing",
        "subjects": [
          "Food and drink processing",
          "Textiles",
          "Clothes",
          "Footwear",
          "Leather",
          "Materials",
          "Mining and extraction"
        ]
      },
      {
        "index": "58",
        "name": "Architecture and building",
        "subjects": [
          "Architecture and town planning",
          "Structural architecture",
          "Landscape architecture",
          "Community planning",
          "Cartography",
          "Building",
          "Construction",
          "Civil engineering"
        ]
      }
    ]
  },
  {
    "index": "6",
    "name": "Agriculture",
    "fieldsOfEducation": [
      {
        "index": "62",
        "name": "Agriculture, forestry and fishery",
        "subjects": [
          "Agriculture",
          "Crop and livestock production",
          "Agronomy",
          "Animal husbandry",
          "Horticulture and gardening",
          "Forestry and forest product techniques",
          "Natural parks",
          "Wildlife",
          "Fisheries",
          "Fishery science and technology"
        ]
      },
      {
        "index": "64",
        "name": "Veterinary",
        "subjects": [
          "Veterinary medicine",
          "Veterinary assisting"
        ]
      }
    ]
  },
  {
    "index": "7",
    "name": "Health and welfare",
    "fieldsOfEducation": [
      {
        "index": "72",
        "name": "Health",
        "subjects": [
          "Medicine",
          "Anatomy",
          "Epidemiology",
          "Cytology",
          "Physiology",
          "Immunology and immunohaematology",
          "Pathology",
          "Anaesthesiology",
          "Paediatrics",
          "Obstetrics andgynaecology",
          "Internal medicine",
          "Surgery",
          "Neurology",
          "Psychiatry",
          "Radiology",
          "Ophthalmology",
          "Medical services",
          "Public health services",
          "Hygiene",
          "Pharmacy",
          "Pharmacology",
          "Therapeutics",
          "Rehabilitation",
          "Prosthetics",
          "Optometry",
          "Nutrition",
          "Nursing",
          "Basic nursing",
          "Midwifery",
          "Dental services",
          "Dental assisting",
          "Dental hygienist",
          "Dental laboratory technician",
          "Odontology"
        ]
      },
      {
        "index": "76",
        "name": "Social services",
        "subjects": [
          "Social care",
          "Care of the disabled",
          "Childcare",
          "Youth services",
          "Gerontological services",
          "Social work",
          "Counselling",
          "Welfare not elsewhere classified"
        ]
      }
    ]
  },
  {
    "index": "8",
    "name": "Services",
    "fieldsOfEducation": [
      {
        "index": "81",
        "name": "Personal services",
        "subjects": [
          "Hotel and catering",
          "Travel and tourism",
          "Sports and leisure",
          "Hairdressing",
          "Beauty treatment",
          "And other personal services",
          "Cleaning",
          "Laundry",
          "Dry-cleaning",
          "Cosmetic services",
          "Domestic science"
        ]
      },
      {
        "index": "84",
        "name": "Transport services",
        "subjects": [
          "Seamanship",
          "Ship’s officer",
          "Nautical science",
          "Air crew",
          "Air traffic control",
          "Railway operations",
          "Road motor vehicle operations",
          "Postal service"
        ]
      },
      {
        "index": "85",
        "name": "Environmental protection",
        "subjects": [
          "Environmental conservation",
          "Control and protection",
          "Air and water pollution control",
          "Labour protection and security"
        ]
      },
      {
        "index": "86",
        "name": "Security services",
        "subjects": [
          "Protection of property and persons",
          "Police work and related law enforcement",
          "Criminology",
          "Fire-protection and fire fighting",
          "Civil security",
          "Military"
        ]
      }
    ]
  }
]