{
  "uri": "http://www.ivoa.net/rdf/messenger",
  "flavour": "RDF Class",
  "terms": {
    "Photon": {
      "label": "Photon",
      "description": "          Carrier particles of the electromagnetic interaction",
      "preliminary": "",
      "wider": [],
      "narrower": [
        "Radio",
        "Millimeter",
        "Infrared",
        "Optical",
        "UV",
        "X-ray",
        "Gamma-ray",
        "EUV"
      ]
    },
    "Radio": {
      "label": "Radio",
      "description": "           Photon with a wavelength longer than 10 mm (or \u03bd<30 GHz)",
      "preliminary": "",
      "wider": [
        "Photon"
      ],
      "narrower": []
    },
    "Millimeter": {
      "label": "Millimeter",
      "description": "      Photon with a wavelength between 0.1 mm and 10 mm (or 30 GHz<=\u03bd<300 GHz)",
      "preliminary": "",
      "wider": [
        "Photon"
      ],
      "narrower": []
    },
    "Infrared": {
      "label": "Infrared",
      "description": "        Photon with a wavelength between 1 \u00b5m and 100 \u00b5m",
      "preliminary": "",
      "wider": [
        "Photon"
      ],
      "narrower": []
    },
    "Optical": {
      "label": "Optical",
      "description": "         Photon with a wavelength between 300 nm and 1000 nm",
      "preliminary": "",
      "wider": [
        "Photon"
      ],
      "narrower": []
    },
    "UV": {
      "label": "Ultraviolet",
      "description": "     Photon with a wavelength between 100 nm and 300 nm",
      "preliminary": "",
      "wider": [
        "Photon"
      ],
      "narrower": [
        "EUV"
      ]
    },
    "EUV": {
      "label": "Extreme UV",
      "description": "      Photon with an energy between 12 eV and 120 eV",
      "preliminary": "",
      "wider": [
        "UV"
      ],
      "narrower": []
    },
    "X-ray": {
      "label": "X-Ray",
      "description": "           Photon with an energy between 120 eV and 120 keV",
      "preliminary": "",
      "wider": [
        "Photon"
      ],
      "narrower": []
    },
    "Gamma-ray": {
      "label": "Gamma Ray",
      "description": "       Photon with an energy above 120 keV",
      "preliminary": "",
      "wider": [
        "Photon"
      ],
      "narrower": []
    },
    "Neutrino": {
      "label": "Neutrino",
      "description": "        This term comprises all generations of neutrinos (electron, \u00b5, \u03c4), and particles as well as antiparticles.",
      "preliminary": "",
      "wider": [],
      "narrower": []
    }
  }
}