{
  "categories": [
    { "name":  "hardware"},
    { "name":  "material"},
    { "name":  "tools"}
  ],
  "properties": [
    { "name": "angle", "unit_symbol": "°", "unit_name": "degree", "unit_name_plural": "degrees" },
    { "name": "area", "unit_symbol": "m²", "unit_name": "square meter", "unit_name_plural": "square meters" },
    { "name": "current", "unit_symbol": "A", "unit_name": "ampere", "unit_name_plural": "amperes" },
    { "name": "diameter", "unit_symbol": "m", "unit_name": "meter", "unit_name_plural": "meters" },
    { "name": "energy", "unit_symbol": "J", "unit_name": "joule", "unit_name_plural": "joules" },
    { "name": "frequency", "unit_symbol": "Hz", "unit_name": "hertz", "unit_name_plural": "hertz" },
    { "name": "height", "unit_symbol": "m", "unit_name": "meter", "unit_name_plural": "meters" },
    { "name": "length", "unit_symbol": "m", "unit_name": "meter", "unit_name_plural": "meters" },
    { "name": "memory", "unit_symbol": "B", "unit_name": "byte", "unit_name_plural": "bytes", "base2_prefix": true },
    { "name": "power", "unit_symbol": "W", "unit_name": "watt", "unit_name_plural": "watts" },
    { "name": "price", "unit_symbol": "€", "unit_name": "euro", "unit_name_plural": "euros" },
    { "name": "speed", "unit_symbol": "m/s", "unit_name": "meter per second", "unit_name_plural": "meters per second" },
    { "name": "temperature", "unit_symbol": "°C", "unit_name": "degree Celsius", "unit_name_plural": "degrees Celsius" },
    { "name": "time", "unit_symbol": "s", "unit_name": "second", "unit_name_plural": "seconds" },
    { "name": "voltage", "unit_symbol": "V", "unit_name": "volt", "unit_name_plural": "volts" },
    { "name": "volume", "unit_symbol": "l", "unit_name": "liter", "unit_name_plural": "liters" },
    { "name": "weight", "unit_symbol": "g", "unit_name": "gram", "unit_name_plural": "grams" },
    { "name": "width", "unit_symbol": "m", "unit_name": "meter", "unit_name_plural": "meters" }
  ],
  "tags": [
    {"name": "bolt", "category": "hardware"},
    {"name": "chisel", "category": "tools"},
    {"name": "clamp", "category": "tools"},
    {"name": "drill", "category": "tools"},
    {"name": "ear plugs", "category": "tools"},
    {"name": "extension cord", "category": "tools"},
    {"name": "flashlight", "category": "tools"},
    {"name": "gloves", "category": "tools"},
    {"name": "goggles", "category": "tools"},
    {"name": "hammer", "category": "tools"},
    {"name": "level", "category": "tools"},
    {"name": "mask", "category": "tools"},
    {"name": "nail", "category": "hardware"},
    {"name": "nut", "category": "hardware"},
    {"name": "paint brush", "category": "tools"},
    {"name": "paint roller", "category": "tools"},
    {"name": "paint tray", "category": "tools"},
    {"name": "pliers", "category": "tools"},
    {"name": "power strip", "category": "tools"},
    {"name": "sander", "category": "tools"},
    {"name": "saw", "category": "tools"},
    {"name": "screw", "category": "hardware"},
    {"name": "screwdriver", "category": "tools"},
    {"name": "soldering iron", "category": "tools"},
    {"name": "stapler", "category": "tools"},
    {"name": "tape measure", "category": "tools"},
    {"name": "tool"},
    {"name": "vise", "category": "tools"},
    {"name": "washer", "category": "hardware"},
    {"name": "wrench", "category": "tools"}
  ]
}