System.Object
   ArcGIS.Core.Data.DDL.Description
      ArcGIS.Core.Data.DDL.DomainDescription
         ArcGIS.Core.Data.DDL.CodedValueDomainDescription
         ArcGIS.Core.Data.DDL.RangeDomainDescription
      ArcGIS.Core.Data.DDL.FeatureDatasetDescription
      ArcGIS.Core.Data.DDL.FieldDescription
      ArcGIS.Core.Data.DDL.ShapeDescription
      ArcGIS.Core.Data.DDL.TableDescription
         ArcGIS.Core.Data.DDL.FeatureClassDescription
            ArcGIS.Core.Data.DDL.AnnotationFeatureClassDescription
   ArcGIS.Core.Data.DDL.SchemaBuilder
   ArcGIS.Core.Data.DDL.Token
      ArcGIS.Core.Data.DDL.CodedValueDomainToken
      ArcGIS.Core.Data.DDL.FeatureDatasetToken
      ArcGIS.Core.Data.DDL.RangeDomainToken
      ArcGIS.Core.Data.DDL.TableToken
         ArcGIS.Core.Data.DDL.FeatureClassToken
            ArcGIS.Core.Data.DDL.AnnotationFeatureClassToken

Reference

ArcGIS.Core Assembly