{
    "$schema": "http://json-schema.org/draft-07/schema#",
    "oneOf": [
        {
            "properties": {
                "@level": {
                    "const": "0"
                },
                "@classId": {
                    "const": "1"
                },
                "#text": {
                    "const": "Group of organisations, project"
                }
            }
        },
        {
            "properties": {
                "@level": {
                    "const": "0"
                },
                "@classId": {
                    "const": "2"
                },
                "#text": {
                    "const": "Organisations"
                }
            }
        },
        {
            "properties": {
                "@level": {
                    "const": "1"
                },
                "@classId": {
                    "const": "2.1"
                },
                "#text": {
                    "const": "Private companies"
                }
            }
        },
        {
            "properties": {
                "@level": {
                    "const": "1"
                },
                "@classId": {
                    "const": "2.2"
                },
                "#text": {
                    "const": "Governmental organisations"
                }
            }
        },
        {
            "properties": {
                "@level": {
                    "const": "1"
                },
                "@classId": {
                    "const": "2.3"
                },
                "#text": {
                    "const": "Non-governmental organisations"
                }
            }
        },
        {
            "properties": {
                "@level": {
                    "const": "1"
                },
                "@classId": {
                    "const": "2.4"
                },
                "#text": {
                    "const": "Other organisations"
                }
            }
        },
        {
            "properties": {
                "@level": {
                    "const": "0"
                },
                "@classId": {
                    "const": "3"
                },
                "#text": {
                    "const": "Working groups within organisation"
                }
            }
        },
        {
            "properties": {
                "@level": {
                    "const": "0"
                },
                "@classId": {
                    "const": "4"
                },
                "#text": {
                    "const": "Persons"
                }
            }
        },
        {
            "properties": {
                "@level": {
                    "const": "0"
                },
                "@classId": {
                    "const": "5"
                },
                "#text": {
                    "const": "Other"
                }
            }
        }
    ]
}