KnowledgeGraphLayer Class

In This Topic

A knowledge graph layer is a composite layer with a knowledge graph as its data source.

Object Model

Syntax

C#
Visual Basic (Declaration)

public sealed class KnowledgeGraphLayer : CompositeLayerWithTables, ArcGIS.Desktop.Core.IMetadataInfo, ILayerContainer, IMetadataSource, IStandaloneTableContainer, System.ComponentModel.INotifyPropertyChanged

Public NotInheritable Class KnowledgeGraphLayer 
   Inherits CompositeLayerWithTables
   Implements ArcGIS.Desktop.Core.IMetadataInfo, ILayerContainer, IMetadataSource, IStandaloneTableContainer, System.ComponentModel.INotifyPropertyChanged

Remarks

The knowledge graph layer contains knowledge graph feature layers and knowledge graph tables. One knowledge graph feature layer is created within the knowledge graph composite layer per entity and relationship type when the entity and relationship instances can have spatial features. A standalone table is created within the knowledge graph composite layer per entity and relationship type that is nonspatial.
The underlying knowledge graph datasource can be accessed off any of the child entity and relationship featurelayers and/or standalone tables.

Example

Getting a Connection from a KnowledgeGraphLayer

var kgLayer = MapView.Active.Map.GetLayersAsFlattenedList()
        .OfType<KnowledgeGraphLayer>().FirstOrDefault();
//KnowledgeGraphLayer is a composite layer - get the first 
//child feature layer or standalone table
QueuedTask.Run(() =>
{
  var featlayer = kgLayer?.GetLayersAsFlattenedList()?
                  .OfType<FeatureLayer>()?.FirstOrDefault();
  KnowledgeGraph kg = null;
  if (featlayer != null)
  {
    using (var fc = featlayer.GetFeatureClass())
      kg = fc.GetDatastore() as KnowledgeGraph;
    //TODO use KnowledgeGraph
  }
  else
  {
    //try standalone table
    var stbl = kgLayer?.GetStandaloneTablesAsFlattenedList()?
                    .FirstOrDefault();
    if (stbl != null)
    {
      using (var tbl = stbl.GetTable())
        kg = tbl.GetDatastore() as KnowledgeGraph;
      //TODO use KnowledgeGraph
    }
  }
});

Inheritance Hierarchy

System.Object
   ArcGIS.Desktop.Framework.Contracts.PropertyChangedBase
      ArcGIS.Desktop.Mapping.MapMember
         ArcGIS.Desktop.Mapping.Layer
            ArcGIS.Desktop.Mapping.CompositeLayer
               ArcGIS.Desktop.Mapping.CompositeLayerWithTables
                  ArcGIS.Desktop.Mapping.KnowledgeGraphLayer

Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3.2 or higher.

Reference

KnowledgeGraphLayer Members
ArcGIS.Desktop.Mapping Namespace

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