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{
    "$schema": "http://json-schema.org/schema#",
    "id": "http://advancedcustomfields.com/json-schema/field_group",
    "type": "object",
    "definitions": {
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        },
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        "intBool": {
            "type": "integer",
            "enum": [0, 1]
        },
        "slug": {
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            "pattern": "^[a-z0-9\\-_]*$"
        },
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            "type": "string",
            "enum": ["==", "!="]
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                        "email",
                        "url",
                        "password",
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                        "oembed",
                        "image",
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                        "gallery",
                        "select",
                        "checkbox",
                        "radio",
                        "true_false",
                        "post_object",
                        "page_link",
                        "relationship",
                        "taxonomy",
                        "user",
                        "google_map",
                        "date_picker",
                        "color_picker",
                        "message",
                        "tab",
                        "repeater",
                        "flexible_content"
                    ]
                },
                "instructions": {
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                            "enum": [0]
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                    "enum": ["", "br", "wpautop"]
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                    "$ref": "#/definitions/intOrEmpty"
                },

                "tabs": {
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                    "enum": ["all", "visual", "text"]
                },
                "toolbar": {
                    "type": "string",
                    "enum": ["full", "basic"]
                },
                "media_upload": {
                    "$ref": "#/definitions/intBool"
                },

                "width": {
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                },
                "height": {
                    "$ref": "#/definitions/intOrEmpty"
                },

                "return_format": {
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                            "type": "string"
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                            "type": "string",
                            "enum": [
                                "object",
                                "array",
                                "url",
                                "id"
                            ]
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                "preview_size": {
                    "type": "string"
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                "library": {
                    "type": "string",
                    "enum": ["all", "uploadedTo"]
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                "min_width": {
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                        { "type": "string" },
                        { "type": "integer" }
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                "min_height": {
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                        { "type": "string" },
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                "min_size": {
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                        { "type": "string" },
                        { "type": "integer" }
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                "max_height": {
                    "oneOf": [
                        { "type": "string" },
                        { "type": "integer" }
                    ]
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                "max_size": {
                    "oneOf": [
                        { "type": "string" },
                        { "type": "integer" }
                    ]
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                "mime_types": {
                    "type": "string"
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                "choices": {
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                    "additionalProperties": {
                        "type": "string"
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                    "$ref": "#/definitions/intBool"
                },
                "multiple": {
                    "$ref": "#/definitions/intBool"
                },
                "ui": {
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                },
                "ajax": {
                    "$ref": "#/definitions/intBool"
                },
                "other_choice": {
                    "$ref": "#/definitions/intBool"
                },
                "save_other_choice": {
                    "$ref": "#/definitions/intBool"
                },
                "layout": {
                    "type": "string",
                    "enum": [
                        "vertical",
                        "horizontal",
                        "table",
                        "block",
                        "row"
                    ]
                },
                "toggle": {
                    "$ref": "#/definitions/intBool"
                },
                "message": {
                    "type": "string"
                },

                "post_type": {
                    "type": "array",
                    "items": {
                        "type": "string"
                    }
                },
                "taxonomy": {
                    "oneOf": [
                        {
                            "type": "string"
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                        {
                            "type": "array",
                            "items": {
                                "type": "string",
                                "pattern": "^[a-z0-9\\-_]+:[a-z0-9\\-_]+$"
                            }
                        }
                    ]
                },
                "filters": {
                    "type": "array",
                    "items": {
                        "type": "string",
                        "enum": ["search", "post_type", "taxonomy"]
                    }
                },
                "elements": {
                    "$ref": "#/definitions/stringArrayOrEmpty"
                },
                "field_type": {
                    "type": "string",
                    "enum": ["checkbox", "multi_select", "radio", "select"]
                },
                "add_term": {
                    "$ref": "#/definitions/intBool"
                },
                "save_terms": {
                    "$ref": "#/definitions/intBool"
                },
                "load_terms": {
                    "$ref": "#/definitions/intBool"
                },
                "role": {
                    "$ref": "#/definitions/stringArrayOrEmpty"
                },

                "center_lat": {
                    "oneOf": [
                        { "type": "integer" },
                        { "type": "string" }
                    ]
                },
                "center_lng": {
                    "oneOf": [
                        { "type": "integer" },
                        { "type": "string" }
                    ]
                },
                "zoom": {
                    "oneOf": [
                        { "type": "integer" },
                        { "type": "string" }
                    ]
                },

                "display_format": {
                    "type": "string"
                },
                "first_day": {
                    "type": "integer",
                    "minimum": 0,
                    "maximum": 6
                },

                "esc_html": {
                    "$ref": "#/definitions/intBool"
                },

                "placement": {
                    "type": "string",
                    "enum": ["top", "left"]
                },
                "endpoint": {
                    "$ref": "#/definitions/intBool"
                },

                "collapsed": {
                    "$ref": "#/definitions/slug"
                },
                "button_label": {
                    "type": "string"
                },
                "sub_fields": {
                    "type": "array",
                    "items": {
                        "$ref": "#/definitions/field"
                    }
                },
                "layouts": {
                    "type": "array",
                    "items": {
                        "type": "object",
                        "properties": {
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                                "$ref": "#/definitions/slug"
                            },
                            "label": {
                                "type": "string"
                            },
                            "name": {
                                "$ref": "#/definitions/slug"
                            },
                            "display": {
                                "type": "string",
                                "enum": ["table", "block", "row"]
                            },
                            "sub_fields": {
                                "type": "array",
                                "items": {
                                    "$ref": "#/definitions/field"
                                }
                            },
                            "min": {
                                "$ref": "#/definitions/intOrEmpty"
                            },
                            "max": {
                                "$ref": "#/definitions/intOrEmpty"
                            }
                        },
                        "required": ["key", "name", "label"]
                    }
                }
            },
            "required": ["key", "label", "name", "type"]
        }
    },
    "properties": {
        "key": {
            "$ref": "#/definitions/slug"
        },
        "title": {
            "type": "string"
        },
        "fields": {
            "type": "array",
            "items": {
                "$ref": "#/definitions/field"
            }
        },
        "location": {
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            "items": {
                "type": "array",
                "items": {
                    "type": "object",
                    "properties": {
                        "param": {
                            "type": "string",
                            "enum": [
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                                "post_status",
                                "post_format",
                                "post_category",
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                                "page_template",
                                "page_type",
                                "page_parent",
                                "page",
                                "current_user",
                                "current_user_role",
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                                "user_role",
                                "attachment",
                                "taxonomy",
                                "comment",
                                "widget",
                                "options_page"
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                        "operator": {
                            "$ref": "#/definitions/equality"
                        },
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                                { "type": "string" },
                                { "type": "integer" }
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                    "required": ["param", "operator", "value"]
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        "menu_order": {
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        "position": {
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            "enum": ["normal", "high", "side"]
        },
        "style": {
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            "enum": ["default", "seamless"]
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        "label_placement": {
            "type": "string",
            "enum": ["top", "left"]
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        "instruction_placement": {
            "type": "string",
            "enum": ["label", "field"]
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        "hide_on_screen": {
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                    "$ref": "#/definitions/empty"
                },
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                    "type": "array",
                    "items": {
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        },
        "active": {
            "$ref": "#/definitions/intBool"
        },
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            "type": "string"
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        "private": {
            "$ref": "#/definitions/intBool"
        },
        "modified": {
            "type": "integer"
        }
    },
    "required": [ "key", "title", "fields" ]
}