KnowledgeGraph

与 knowledgeGraphService 相关联的知识图谱。这是一个存储实体和关系的图谱数据库。

另请参阅

knowledgeGraphService.fetchKnowledgeGraph()
托管知识图谱服务，了解通过 GeoScene Enterprise 和 REST API 获取有关结构知识图谱服务的信息

示例

//fetch the knowledge graph
require([
  "geoscene/rest/knowledgeGraphService"
], (KnowledgeGraphModule)  => {
  const url = "https://<web server hostname>/server/rest/admin/services/<serviceName>/KnowledgeGraphServer";
  KnowledgeGraphModule.fetchKnowledgeGraph(url)
   .then((kg) => {
      //do something with result
     console.log(kg)
  });
});

//sample result returned from fetchKnowledgeGraph()
{
 "url":"https://myHostName.domain.com/geoscene/rest/services/Hosted/myServiceName/KnowledgeGraphServer"
 {
 "dataModel": {
   "declaredClass": "geoscene.rest.knowledgeGraph.DataModel",
   "timestamp": {},
   "spatialReference": {
     "latestWkid": 0,
     "wkid": 4326,
     "vcsWkid": 0,
     "latestVcsWkid": 0
   },
   "strict": false,
   "entityTypes": [
     {
       "declaredClass": "geoscene.rest.knowledgeGraph.EntityType",
       "name": "company",
       "alias": "Company",
       "role": "Regular",
       "strict": false,
       "properties": [
         {
           "declaredClass": "geoscene.rest.knowledgeGraph.GraphProperty",
           "name": "Name",
           "alias": "Name",
           "fieldType": "esriFieldTypeString",
           "geometryType": "esriGeometryNull",
           "hasM": false,
           "hasZ": false,
           "nullable": true,
           "editable": true,
           "required": false,
           "defaultVisibility": true,
           "systemMaintained": false,
           "searchable": false,
           "defaultValue": null
         },
         {
           "declaredClass": "geoscene.rest.knowledgeGraph.GraphProperty",
           "name": "id",
           "alias": "ID",
           "fieldType": "esriFieldTypeOID",
           "geometryType": "esriGeometryNull",
           "hasM": false,
           "hasZ": false,
           "nullable": false,
           "editable": false,
           "required": true,
           "defaultVisibility": true,
           "systemMaintained": true,
           "searchable": false,
           "defaultValue": null
         }
       ],
       "fieldIndexes": [
         {
           "declaredClass": "geoscene.rest.knowledgeGraph.FieldIndex",
           "name": "esri__id_idx",
           "unique": true,
           "ascending": true,
           "description": "",
           "fieldNames": [
             "id"
           ]
         },
         {
           "declaredClass": "geoscene.rest.knowledgeGraph.FieldIndex",
           "name": "geoscene__name_idx",
           "unique": true,
           "ascending": true,
           "description": "",
           "fieldNames": [
             "name"
           ]
         }
       ]
     }
   ],
   "relationshipTypes": [
     {
       "declaredClass": "geoscene.rest.knowledgeGraph.RelationshipType",
       "name": "employed_bu",
       "alias": "Employed By",
       "role": "Regular",
       "strict": false,
       "properties": [
         {
           "declaredClass": "geoscene.rest.knowledgeGraph.GraphProperty",
           "name": "id",
           "alias": "id",
           "fieldType": "esriFieldTypeGUID",
           "geometryType": "esriGeometryNull",
           "hasM": false,
           "hasZ": false,
           "nullable": false,
           "editable": false,
           "required": true,
           "defaultVisibility": true,
           "systemMaintained": true,
           "searchable": false,
           "defaultValue": null
         },
         {
           "declaredClass": "geoscene.rest.knowledgeGraph.GraphProperty",
           "name": "start_date",
           "alias": "Start Date",
           "fieldType": "esriFieldTypeGUID",
           "geometryType": "esriGeometryNull",
           "hasM": false,
           "hasZ": false,
           "nullable": false,
           "editable": false,
           "required": true,
           "defaultVisibility": true,
           "systemMaintained": false,
           "searchable": false,
           "defaultValue": null
         }
       ],
       "fieldIndexes": [
            {
            "ascending": true,
            "description": "index on id field",
            "fieldNames": ["id"],
            "name": "esri_id_idx",
            "unique": "true",
          }
       ],
       "originEntityTypes": [
         "Person"
       ],
       "destinationEntityTypes": [
         "Company"
       ]
     }
   ]
  }
 }
}

构造函数

new KnowledgeGraph(properties)

参数

properties Object

optional

有关可能传递给构造函数的所有属性的列表，请参见属性。

属性概述

可以设置、检索或侦听任何属性。请参阅使用属性主题。

显示继承属性

隐藏继承属性

类型	描述	类
DataModel	知识图谱服务的数据模型。更多详情	KnowledgeGraph
String	类的名称。更多详情	Accessor
String	托管知识图谱的 url。更多详情	KnowledgeGraph

属性详细信息

dataModel DataModel

知识图谱服务的数据模型。数据模型定义了可存在于知识图谱中的实体和关系类型，以及可存在于每种实体类型和关系中的属性。

declaredClass Stringreadonly inherited

类的名称。声明的类名称格式化为 geoscene.folder.className。

url String

托管知识图谱的 url。有关知识图谱服务的详细信息，请参阅 GeoScene 托管知识图谱。

方法概述

显示继承的方法

隐藏继承的方法

返回值类值	描述	类
	添加一个或多个与对象的生命周期相关联的句柄。更多详情	Accessor
Boolean	如果存在指定的句柄组，则返回 true。更多详情	Accessor
	移除对象拥有的句柄组。更多详情	Accessor

方法详细说明

addHandles(handleOrHandles, groupKey)inherited

添加一个或多个与对象的生命周期相关联的句柄。当对象被销毁时，将移除句柄。

// Manually manage handles
const handle = reactiveUtils.when(
  () => !view.updating,
  () => {
    wkidSelect.disabled = false;
  },
  { once: true }
);

// Handle gets removed when the object is destroyed.
this.addHandles(handle);

参数

handleOrHandles WatchHandle|WatchHandle []

对象销毁后，标记为要移除的句柄。

groupKey *

optional

标识句柄应添加到的组的键。组中的所有句柄稍后都可使用 Accessor.removeHandles() 进行删除。如果未提供键，则句柄将被添加到默认组。

hasHandles(groupKey){Boolean}inherited

如果存在指定的句柄组，则返回 true。

参数

groupKey *

optional

组键。

类型	描述
Boolean	如果存在指定的句柄组，则返回 `true`。

示例

// Remove a named group of handles if they exist.
if (obj.hasHandles("watch-view-updates")) {
  obj.removeHandles("watch-view-updates");
}

removeHandles(groupKey)inherited

移除对象拥有的句柄组。

参数

groupKey *

optional

要移除的组键或组键的数组或集合。

示例

obj.removeHandles(); // removes handles from default group

obj.removeHandles("handle-group");
obj.removeHandles("other-handle-group");

GeoScene Maps SDK for JavaScript参考手册

构造函数

属性概述

属性详细信息

方法概述

方法详细说明