{
    "title": "Field",
    "description": "A reusable form element for presets",
    "type": "object",
    "properties": {
        "key": {
            "description": "Tag key whose value is to be displayed",
            "type": "string"
        },
        "keys": {
            "description": "Tag keys whose value is to be displayed",
            "type": "array",
            "items": {
                "type": "string"
            }
        },
        "reference": {
            "description": "Taginfo documentation parameters (to be used when a field manages multiple tags)",
            "type": [
                {
                    "type": "object",
                    "properties": {
                        "key": {
                            "description": "For documentation of a key",
                            "type": "string",
                            "required": true
                        },
                        "value": {
                            "description": "For documentation of a tag (key and value)",
                            "type": "string"
                        }
                    },
                    "additionalProperties": false
                },
                {
                    "type": "object",
                    "properties": {
                        "rtype": {
                            "description": "For documentation of a relation type",
                            "type": "string"
                        }
                    },
                    "additionalProperties": false
                }
            ]
        },
        "type": {
            "description": "Type of field",
            "type": "string",
            "enum": [
                "access",
                "address",
                "check",
                "combo",
                "cycleway",
                "defaultCheck",
                "email",
                "lanes",
                "identifier",
                "localized",
                "maxspeed",
                "multiCombo",
                "networkCombo",
                "number",
                "onewayCheck",
                "radio",
                "restrictions",
                "semiCombo",
                "structureRadio",
                "tel",
                "textarea",
                "text",
                "typeCombo",
                "url",
                "wikidata",
                "wikipedia"
            ],
            "required": true
        },
        "label": {
            "description": "English label for the field caption",
            "type": "string",
            "required": true
        },
        "geometry": {
            "description": "If specified, only show the field for this kind of geometry",
            "type": "string"
        },
        "default": {
            "description": "The default value for this field",
            "type": "string"
        },
        "options": {
            "description": "List of untranslatable string suggestions (combo fields)",
            "type": "array",
            "items": {
                "type": "string"
            }
        },
        "universal": {
            "description": "If true, this field will appear in the Add Field list for all presets",
            "type": "boolean",
            "default": false
        },
        "icon": {
            "type": "string"
        },
        "placeholder": {
            "description": "Placeholder text for this field",
            "type": "string"
        },
        "strings": {
            "description": "Strings sent to transifex for translation",
            "type": "object",
            "properties": {
                "options": {
                    "description": "Translatable options (combo fields)",
                    "type": "object"
                }
            },
            "additionalProperties": {
                "description": "Specialized fields can request translation of arbitrary strings",
                "type": "object"
            }
        },
        "snake_case": {
            "description": "If true, replace spaces with underscores in the tag value (combo fields only)",
            "type": "boolean",
            "default": true
        },
        "caseSensitive": {
            "description": "If true, allow case sensitive field values (combo fields only)",
            "type": "boolean",
            "default": false
        },
        "minValue": {
            "description": "Minimum field value (number fields only)",
            "type": "integer"
        },
        "maxValue": {
            "description": "Maximum field value (number fields only)",
            "type": "integer"
        },
        "prerequisiteTag": {
            "description": "Tagging constraint for showing this field in the editor",
            "type": {
                "anyOf": [
                    {
                        "type": "object",
                        "properties": {
                            "key": {
                                "description": "The key of the required tag",
                                "type": "string",
                                "required": true
                            },
                            "value": {
                                "description": "The value that the tag must have. (alternative to 'valueNot')",
                                "type": "string"
                            },
                            "valueNot": {
                                "description": "The value that the tag cannot have. (alternative to 'value')",
                                "type": "string"
                            }
                        },
                        "additionalProperties": false
                    },
                    {
                        "type": "object",
                        "properties": {
                            "keyNot": {
                                "description": "A key that must not be present",
                                "type": "string",
                                "required": true
                            }
                        },
                        "additionalProperties": false
                    }
                ]
            }
        },
        "terms": {
            "description": "English synonyms or related search terms",
            "type": "array",
            "items": {
                "type": "string"
            }
        },
        "countryCodes":  {
            "description": "Countries where to allow the field, as lowercase ISO 3166-1 alpha-2 codes (https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2)",
            "type": "array",
            "uniqueItems": true,
            "items": {
                "type": "string",
                "pattern": "^[a-z]{2}$"
            }
        },
        "notCountryCodes":  {
            "description": "Countries where NOT to allow the field, as lowercase ISO 3166-1 alpha-2 codes (https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2)",
            "type": "array",
            "uniqueItems": true,
            "items": {
                "type": "string",
                "pattern": "^[a-z]{2}$"
            }
        },
        "urlFormat":  {
            "description": "Permalink URL for `identifier` fields. Must contain a {value} placeholder",
            "type": "string"
        },
        "pattern":  {
            "description": "Regular expression that a valid `identifier` value is expected to match",
            "type": "string"
        }
    },
    "additionalProperties": false
}