ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Core.Data.DDL Namespace / RelationshipClassDescription Class / RelationshipClassDescription Constructor / RelationshipClassDescription Constructor(String,TableDescription,TableDescription,RelationshipCardinality,String,String)
The name of the description.
The origin class of the ArcGIS.Core.Data.RelationshipClass.
The destination class of the ArcGIS.Core.Data.RelationshipClass.
The relationship cardinality of the ArcGIS.Core.Data.RelationshipClass.
The name of the ArcGIS.Core.Data.Field in the origin class that serves as the origin primary key.
The name of the ArcGIS.Core.Data.Field in the destination class that serves as the origin foreign key.
Example Version

RelationshipClassDescription Constructor(String,TableDescription,TableDescription,RelationshipCardinality,String,String)
Creates a description object of the ArcGIS.Core.Data.RelationshipClass.
Syntax

Parameters

relationshipClassName
The name of the description.
originClassDescription
The origin class of the ArcGIS.Core.Data.RelationshipClass.
destinationClassDescription
The destination class of the ArcGIS.Core.Data.RelationshipClass.
relationshipCardinality
The relationship cardinality of the ArcGIS.Core.Data.RelationshipClass.
originPrimaryKey
The name of the ArcGIS.Core.Data.Field in the origin class that serves as the origin primary key.
originForeignKey
The name of the ArcGIS.Core.Data.Field in the destination class that serves as the origin foreign key.
Exceptions
Example
Creating relationship class
public void CreateRelationshipWithRelationshipRules(SchemaBuilder schemaBuilder)
{
    // Creating a 'BuildingType' table with two fields - BuildingType and BuildingTypeDescription
    FieldDescription buildingType = FieldDescription.CreateIntegerField("BuildingType");
    FieldDescription buildingTypeeDescription = FieldDescription.CreateStringField("BuildingTypeDescription", 100);
    TableDescription buildingTypeDescription = new TableDescription("BuildingType", new List<FieldDescription>() { buildingType, buildingTypeeDescription });
    TableToken buildingtypeToken = schemaBuilder.Create(buildingTypeDescription);

    // Creating a 'Building' feature class with three fields - BuildingId, Address, and BuildingType
    FieldDescription buildingId = FieldDescription.CreateIntegerField("BuildingId");
    FieldDescription buildingAddress = FieldDescription.CreateStringField("Address", 100);
    FieldDescription usageSubType = FieldDescription.CreateIntegerField("UsageSubtype");
    FeatureClassDescription featureClassDescription = new FeatureClassDescription("Building", new List<FieldDescription> { buildingId, buildingAddress, buildingType, usageSubType }, new ShapeDescription(GeometryType.Polygon, SpatialReferences.WGS84));

    // Set subtype details (optional)
    featureClassDescription.SubtypeFieldDescription = new SubtypeFieldDescription(usageSubType.Name, new Dictionary<int, string> { { 1, "Marketing" }, { 2, "Utility" } });

    FeatureClassToken buildingToken = schemaBuilder.Create(featureClassDescription);

    // Creating a 1:M relationship between the 'Building' feature class and 'BuildingType' table
    RelationshipClassDescription relationshipClassDescription = new RelationshipClassDescription("BuildingToBuildingType", new FeatureClassDescription(buildingToken), new TableDescription(buildingtypeToken),
      RelationshipCardinality.OneToMany, buildingType.Name, buildingType.Name)
    {
        RelationshipType = RelationshipType.Composite
    };

    // Adding relationship rules for the 'Marketing' subtype
    relationshipClassDescription.RelationshipRuleDescriptions.Add(new RelationshipRuleDescription(1, null));

    schemaBuilder.Create(relationshipClassDescription);
    schemaBuilder.Build();
}
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3.1 or higher.
See Also