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+# AI智慧旅游项目
+
+# 数据范式设计
+>设定要求
+您是一名专业的数据库工程师,熟悉PostgreSQL和ParseServer。
+请注意表名用大驼峰,字段用小驼峰。
+有预留字段:objectId、updatedAt、createdAt。
+关于ParseServer中数据类的描述,字段的主要类型有:
+String => String
+Number => Number
+Bool => bool
+Array => JSON Array
+Object => JSON Object
+Date => Date
+File => Parse.File
+Pointer => other Parse.Object
+Relation => Parse.Relation
+Null => null
+GeoPoint => {latitude: 40.0, longitude: -30.0}
+
+>项目需求
+智能旅游的辅助AI应用,游客/旅行者(_User)、旅游资源(景点、酒店等)、行程提醒与预警、旅行日志与回忆管理、实时客流/天气/交通数据监测、安全风险预警,请您根据旅游外出的行业经验,设计以上几张表,游客/旅行者直接用预留的_User表即可。
+
+>输出结果(UML类图)
+请您帮我用plantuml的类图描述设计好的几张表及关系
+
+>输出结果(信息结构图)
+请您帮我用markmap格式表示上面的信息结构图
+
+>输出结果(SQL语句)
+请您帮我用sql格式给我建表语句和测试数据插入语句
+
+# UML类图
+```plantuml
+@startuml
+' 设置类图方向
+left to right direction
+
+' 定义基本样式
+skinparam groupInheritance 2
+skinparam class {
+    BackgroundColor White
+    ArrowColor #0078d7
+    BorderColor #2e2e2e
+}
+
+' 用户表(使用Parse内置_User类)
+class _User << (P,#FF7700) Parse内置 >> {
+    + objectId: String
+    + username: String
+    + email: String
+    + createdAt: Date
+    + updatedAt: Date
+    + phone: String
+    + profilePic: File
+    + emergencyContact: String
+}
+
+' 旅游资源表
+class TouristResource {
+    + objectId: String
+    + createdAt: Date
+    + updatedAt: Date
+    + name: String
+    + type: String "景点/酒店/餐厅"
+    + description: String
+    + location: GeoPoint
+    + openingHours: String
+    + priceRange: String
+    + images: File[]
+    + rating: Number
+    + capacity: Number "承载量"
+}
+
+' 行程提醒表
+class Itinerary {
+    + objectId: String
+    + createdAt: Date
+    + updatedAt: Date
+    + title: String
+    + startTime: Date
+    + endTime: Date
+    + reminderType: String "时间/位置"
+    + location: GeoPoint "位置提醒"
+    + notes: String
+    + alertLevel: String "高/中/低"
+    + isCompleted: Bool
+}
+
+' 旅行日志表
+class TravelJournal {
+    + objectId: String
+    + createdAt: Date
+    + updatedAt: Date
+    + title: String
+    + content: String
+    + photos: File[]
+    + location: GeoPoint
+    + weatherData: Object "温度/湿度"
+    + moodRating: Number
+}
+
+' 实时监测数据表
+class RealTimeData {
+    + objectId: String
+    + createdAt: Date
+    + updatedAt: Date
+    + dataType: String "客流/天气/交通"
+    + value: Object "动态JSON"
+    + location: GeoPoint
+    + source: String "官方/传感器"
+    + validity: Date "有效期"
+}
+
+' 安全预警表
+class SafetyWarning {
+    + objectId: String
+    + createdAt: Date
+    + updatedAt: Date
+    + title: String
+    + description: String
+    + severity: String "紧急/高/中"
+    + affectedArea: GeoPoint
+    + validUntil: Date
+    + relatedHazards: String[] "自然灾害/事故"
+}
+
+' 定义关系
+_User "1" -- "n" Itinerary : "创建"
+_User "1" -- "n" TravelJournal : "记录"
+Itinerary "n" -- "1" TouristResource : "关联"
+TravelJournal "n" -- "1" TouristResource : "提及"
+RealTimeData "n" -- "1" TouristResource : "监测"
+SafetyWarning "n" -- "n" TouristResource : "影响"
+RealTimeData "1" -- "1" SafetyWarning : "触发"
+Itinerary "1" -- "1" SafetyWarning : "关联预警"
+
+@enduml
+```
+