DataModel

AMD: require(["esri/rest/knowledgeGraph/DataModel"], (DataModel) => { /* code goes here */ });
ESM: import DataModel from "@arcgis/core/rest/knowledgeGraph/DataModel.js";
Class: esri/rest/knowledgeGraph/DataModel
Inheritance: DataModel Accessor
Since: ArcGIS Maps SDK for JavaScript 4.25
beta

The data model defines the entity types and relationship types in a knowledge graph service as well as some additional settings. The DataModel resource allows users to query the properties of both entity and relationship types. By defining these types and their properties, the data model defines the schema of the graph.

Sample of a knowledge graph data model.

 {
 	"dataModel": {
 		"declaredClass": "esri.rest.knowledgeGraph.DataModel",
 		"arcgisManaged": true,
 		"globalIdField": "globalid",
 		"identifierInfo": {
 			"IdentifierMappingInfo": {
 				"databaseNativeIdentifier": null,
 				"identifierInfoType": "esriIdentifierInfoTypeUniformProperty",
 				"uniformPropertyIdentifier": {
 					"identifierPropertyName": "globalid"
 				}
 			},
 			"identifierGenerationInfo": {
 				"uuidMethodHint": "esriUUIDESRI"
 			}
 		},
 		"timestamp": {},
 		"spatialReference": {
 			"latestWkid": 0,
 			"wkid": 4326,
 			"vcsWkid": 0,
 			"latestVcsWkid": 0
 		},
 		"strict": false,
 		"searchIndexes:": [
 			{
 				"analyzers": [
 					{
 						"name": "text_en"
 					}
 				],
 				"name": "esri__search_idx",
 				"searchProperties": [
 					{
 						"key": "Person",
 						"value": {
 							"propertyNames": [
 								"name",
 								"age"
 							]
 						}
 					}
 				],
 				"supportedCategory": null
 			}
 		],
 		"entityTypes": [
 			{
 				"declaredClass": "esri.rest.knowledgeGraph.EntityType",
 				"name": "company",
 				"alias": "Company",
 				"role": "Regular",
 				"strict": false,
 				"properties": [
 					{
 						"declaredClass": "esri.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,
 						"role": "esriGraphPropertyRegular",
 						"defaultValue": null
 					},
 					{
 						"declaredClass": "esri.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,
 						"role": "esriGraphPropertyRegular",
 						"defaultValue": null
 					}
 				],
 				"fieldIndexes": [
 					{
 						"declaredClass": "esri.rest.knowledgeGraph.FieldIndex",
 						"name": "esri__id_idx",
 						"unique": true,
 						"ascending": true,
 						"description": "",
 						"fieldNames": [
 							"id"
 						]
 					},
 					{
 						"declaredClass": "esri.rest.knowledgeGraph.FieldIndex",
 						"name": "esri__name_idx",
 						"unique": true,
 						"ascending": true,
 						"description": "",
 						"fieldNames": [
 							"name"
 						]
 					}
 				]
 			}
 		],
 		"relationshipTypes": [
 			{
 				"declaredClass": "esri.rest.knowledgeGraph.RelationshipType",
 				"name": "employed_by",
 				"alias": "Employed By",
 				"role": "Regular",
 				"strict": false,
 				"properties": [
 					{
 						"declaredClass": "esri.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,
 						"role": "esriGraphPropertyRegular",
 						"defaultValue": null
 					},
 					{
 						"declaredClass": "esri.rest.knowledgeGraph.GraphProperty",
 						"name": "start_date",
 						"alias": "Start Date",
 						"fieldType": "esriFieldTypeDate",
 						"geometryType": "esriGeometryNull",
 						"hasM": false,
 						"hasZ": false,
 						"nullable": false,
 						"editable": false,
 						"required": true,
 						"defaultVisibility": true,
 						"systemMaintained": false,
 						"role": "esriGraphPropertyRegular",
 						"defaultValue": null
 					}
 				],
 				"fieldIndexes": [
 					{
 						"ascending": true,
 						"description": "index on id field",
 						"fieldNames": [
 							"id"
 						],
 						"name": "esri_id_idx",
 						"unique": "true"
 					}
 				],
 				"endpoints": [
 					{
 						"originEntityType": "Person",
 						"destinationEntityType": "Company"
 					}
 				]
 			}
 		]
 	}
 }
See also

Property Overview

Any properties can be set, retrieved or listened to. See the Working with Properties topic.
Show inherited properties Hide inherited properties
Name Type Summary Class
Boolean

Indicates if the data in the graph is managed by ArcGIS Knowledge.

more details
DataModel
String

The name of the class.

more details
Accessor
EntityType[]

A list of the entity types contained in the knowledge graph including their associated properties.

more details
DataModel
Object

Information about the global ID for the knowledge graph.

more details
DataModel
RelationshipType[]

A list of the relationship types in the knowledge graph including their associated properties.

more details
DataModel
SearchIndex[]

List of the search indexes in the knowledge graph.

more details
DataModel
SpatialReference

Specifies spatial reference information for the knowledge graph.

more details
DataModel
Boolean

Indicates whether users can make changes to the data model.

more details
DataModel
Date

The date the data model was last updated.

more details
DataModel

Property Details

arcgisManaged Booleanreadonly

Indicates if the data in the graph is managed by ArcGIS Knowledge. This is true for hosted knowledge graph services and ArcGIS managed external data stores where ArcGIS Knowledge can create, update and delete data. This property is false for user managed external graph stores, in which the data and data model are read only from ArcGIS Knowledge.

Note

Currently the only supported external graph store is Neo4j

declaredClass Stringreadonly inherited

The name of the class. The declared class name is formatted as esri.folder.className.

entityTypes EntityType[]readonly

A list of the entity types contained in the knowledge graph including their associated properties.

identifierInfo Objectreadonly

Information about the global ID for the knowledge graph.

Properties
identifierMappingInfo Object

Information on the type and format of the universally unique identifier

Specification
identifierInfoType String

Indicates the type of the ID. esriIdentifierInfoTypeDatabaseNative is a durable, settable database native identifier. esriIdentifierInfoTypeUniformProperty is a user-defined property that guarantees named type category uniqueness & is uniformly named across the graph.

Possible Values:"esriIdentifierInfoTypeUniformProperty"|"esriIdentifierInfoTypeDatabaseNative"

databaseNativeIdentifier Object

Properties of database native identifier.

uniformPropertyIdentifier Object

Properties of the user defined unique identifier.

Specification
identifierPropertyName String

The name of the unique identifier property for all records.

identifierGenerationInfo Object

Information on how the unique identifier is generated.

uuidMethodHint String

Information on the format of the unique identifier. esriUUIDESRI is a universally unique ID in Esri/Microsoft format: {XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX} UUID_RFC_4122 is a universally unique ID in RFC4122 lowercase format.

Possible Values:"esriUUIDESRI"|"UUID_RFC_4122"

Example
"identifierInfo": {
 	"IdentifierMappingInfo": {
 		"databaseNativeIdentifier": null,
 		"identifierInfoType": "esriIdentifierInfoTypeUniformProperty",
 		"uniformPropertyIdentifier": {
 			"identifierPropertyName": "globalid"
 		}
 	},
 	"identifierGenerationInfo": {
 		"uuidMethodHint": "esriUUIDESRI"
 	}
 }
relationshipTypes RelationshipType[]readonly

A list of the relationship types in the knowledge graph including their associated properties.

searchIndexes SearchIndex[]readonly

List of the search indexes in the knowledge graph.

spatialReference SpatialReferenceautocastreadonly

Specifies spatial reference information for the knowledge graph.

Default Value:null
strict Booleanreadonly

Indicates whether users can make changes to the data model. If true, the data model cannot be modified and knowledgeGraphService.executeApplyEdits() will fail. If false, any user can make changes to the data model. The strict property of the data model can only be set by administrators or the knowledge graph service owner from the ArcGIS REST API Update (Edit Data Model).

timestamp Datereadonly

The date the data model was last updated.

Method Overview

Show inherited methods Hide inherited methods
Name Return Type Summary Class

Adds one or more handles which are to be tied to the lifecycle of the object.

more details
Accessor
*

Creates a new instance of this class and initializes it with values from a JSON object generated from an ArcGIS product.

more details
DataModel
Boolean

Returns true if a named group of handles exist.

more details
Accessor

Removes a group of handles owned by the object.

more details
Accessor
Object

Converts an instance of this class to its ArcGIS portal JSON representation.

more details
DataModel

Method Details

addHandles(handleOrHandles, groupKey)inherited

Adds one or more handles which are to be tied to the lifecycle of the object. The handles will be removed when the object is destroyed.

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

this.addHandles(handle);

// Destroy the object
this.destroy();
Parameters
handleOrHandles WatchHandle|WatchHandle[]

Handles marked for removal once the object is destroyed.

groupKey *
optional

Key identifying the group to which the handles should be added. All the handles in the group can later be removed with Accessor.removeHandles(). If no key is provided the handles are added to a default group.

fromJSON(json){*}static

Creates a new instance of this class and initializes it with values from a JSON object generated from an ArcGIS product. The object passed into the input json parameter often comes from a response to a query operation in the REST API or a toJSON() method from another ArcGIS product. See the Using fromJSON() topic in the Guide for details and examples of when and how to use this function.

Parameter
json Object

A JSON representation of the instance in the ArcGIS format. See the ArcGIS REST API documentation for examples of the structure of various input JSON objects.

Returns
Type Description
* Returns a new instance of this class.
hasHandles(groupKey){Boolean}inherited

Returns true if a named group of handles exist.

Parameter
groupKey *
optional

A group key.

Returns
Type Description
Boolean Returns true if a named group of handles exist.
Example
// Remove a named group of handles if they exist.
if (obj.hasHandles("watch-view-updates")) {
  obj.removeHandles("watch-view-updates");
}
removeHandles(groupKey)inherited

Removes a group of handles owned by the object.

Parameter
groupKey *
optional

A group key or an array or collection of group keys to remove.

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

obj.removeHandles("handle-group");
obj.removeHandles("other-handle-group");
toJSON(){Object}

Converts an instance of this class to its ArcGIS portal JSON representation. See the Using fromJSON() guide topic for more information.

Returns
Type Description
Object The ArcGIS portal JSON representation of an instance of this class.

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