diff --git a/src/Speckle.Objects/BuiltElements/GridLine.cs b/src/Speckle.Objects/BuiltElements/GridLine.cs
deleted file mode 100644
index 52576177..00000000
--- a/src/Speckle.Objects/BuiltElements/GridLine.cs
+++ /dev/null
@@ -1,14 +0,0 @@
-using Speckle.Sdk.Models;
-
-namespace Speckle.Objects.BuiltElements;
-
-[SpeckleType("Objects.BuiltElements.GridLine")]
-public class GridLine : Base, IDisplayValue<List<Base>>
-{
-  public required ICurve baseLine { get; set; }
-  public string label { get; set; }
-  public string units { get; set; }
-
-  [DetachProperty]
-  public List<Base> displayValue { get; set; }
-}
diff --git a/src/Speckle.Objects/BuiltElements/Revit/DirectShape.cs b/src/Speckle.Objects/BuiltElements/Revit/DirectShape.cs
deleted file mode 100644
index 97f1a2f5..00000000
--- a/src/Speckle.Objects/BuiltElements/Revit/DirectShape.cs
+++ /dev/null
@@ -1,26 +0,0 @@
-using Speckle.Objects.Geometry;
-using Speckle.Sdk.Models;
-
-namespace Speckle.Objects.BuiltElements.Revit;
-
-[SpeckleType("Objects.BuiltElements.Revit.DirectShape")]
-public class DirectShape : Base, IDisplayValue<List<Base>>
-{
-  public required string name { get; set; }
-  public RevitCategory category { get; set; }
-  public Base? parameters { get; set; }
-  public string elementId { get; set; }
-
-  [DetachProperty]
-  public List<Base> baseGeometries { get; set; } = new();
-
-  public string units { get; set; }
-
-  [DetachProperty]
-  public List<Base> displayValue { get; set; }
-
-  public bool IsValidObject(Base @base)
-  {
-    return @base is Point || @base is ICurve || @base is Mesh || @base is Brep;
-  }
-}
diff --git a/src/Speckle.Objects/BuiltElements/Revit/Enums.cs b/src/Speckle.Objects/BuiltElements/Revit/Enums.cs
deleted file mode 100644
index 5ae7fa48..00000000
--- a/src/Speckle.Objects/BuiltElements/Revit/Enums.cs
+++ /dev/null
@@ -1,180 +0,0 @@
-namespace Speckle.Objects.BuiltElements.Revit;
-
-//This is an enum so that we can easily create a dropdown in GH for schema builder
-//NOTE: if edited the list in Objects.Converter.Revit.Categories should be updated too
-public enum RevitCategory
-{
-  AbutmentFoundations = 0,
-  AbutmentPiles = 1,
-  AbutmentWalls = 2,
-  DuctTerminal = 4,
-  BridgeAbutments = 3,
-  Alignments = 5,
-  StructConnectionAnchors = 6,
-  ApproachSlabs = 7,
-  BridgeArches = 8,
-  AudioVisualDevices = 9,
-  StairsRailingBaluster = 10,
-  BridgeBearings = 11,
-  StructConnectionBolts = 12,
-  BridgeCables = 13,
-  BridgeDecks = 14,
-  BridgeFraming = 15,
-  CableTrayFitting = 16,
-  CableTrayRun = 17,
-  CableTray = 18,
-  Casework = 19,
-  Ceilings = 20,
-  Columns = 21,
-  CommunicationDevices = 22,
-  ConduitFitting = 23,
-  Conduit = 24,
-  Coordination_Model = 25,
-  BridgeFramingCrossBracing = 26,
-  CurtainWallPanels = 27,
-  CurtaSystem = 28,
-  CurtainWallMullions = 29,
-  DataDevices = 30,
-  BridgeFramingDiaphragms = 31,
-  Doors = 32,
-  DuctAccessory = 33,
-  DuctFitting = 34,
-  PlaceHolderDucts = 35,
-  DuctSystem = 36,
-  DuctCurves = 37,
-  ElectricalEquipment = 38,
-  ElectricalFixtures = 39,
-  Entourage = 40,
-  ExpansionJoints = 41,
-  FireAlarmDevices = 42,
-  FireProtection = 43,
-  Floors = 44,
-  FoodServiceEquipment = 45,
-  Furniture = 46,
-  FurnitureSystems = 47,
-  GenericAnnotation = 48,
-  GenericModel = 49,
-  BridgeGirders = 50,
-  Hardscape = 51,
-  LightingDevices = 52,
-  LightingFixtures = 53,
-  Lines = 54,
-  Mass = 55,
-  MechanicalEquipment = 56,
-  MedicalEquipment = 57,
-  NurseCallDevices = 58,
-  Parking = 59,
-  Parts = 60,
-  PierCaps = 61,
-  PierColumns = 62,
-  BridgeFoundations = 63,
-  PierPiles = 64,
-  BridgeTowers = 65,
-  PierWalls = 66,
-  BridgePiers = 67,
-  PipeAccessory = 68,
-  PipeFitting = 69,
-  PlaceHolderPipes = 70,
-  PipeSegments = 71,
-  PipeCurves = 72,
-  PipingSystem = 73,
-  Planting = 74,
-  StructConnectionPlates = 75,
-  PlumbingFixtures = 76,
-  StructConnectionProfiles = 77,
-  StairsRailing = 78,
-  Ramps = 79,
-  Roads = 80,
-  Roofs = 81,
-  SecurityDevices = 82,
-  StructConnectionShearStuds = 83,
-  Signage = 84,
-  Site = 85,
-  SpecialityEquipment = 86,
-  Sprinklers = 87,
-  Stairs = 88,
-  StructuralFramingSystem = 89,
-  StructuralColumns = 90,
-  StructConnections = 91,
-  FabricAreas = 92,
-  StructuralFoundation = 93,
-  StructuralFraming = 94,
-  Rebar = 95,
-  Coupler = 96,
-  StructuralStiffener = 97,
-  StructuralTendons = 98,
-  StructuralTruss = 99,
-  TemporaryStructure = 100,
-  Topography = 101,
-  BridgeFramingTrusses = 102,
-  VerticalCirculation = 103,
-  VibrationDampers = 104,
-  VibrationIsolators = 105,
-  VibrationManagement = 106,
-  Walls = 107,
-  StructConnectionWelds = 108,
-  Windows = 109,
-  Railings = 110,
-}
-
-/// <summary>
-/// FamilyDocuments can only be assigned these categories
-/// This is a subset of the list above which was manually retrieved from Revit's UI
-/// </summary>
-public enum RevitFamilyCategory
-{
-  AudioVisualDevices = 9,
-  CableTrayFitting = 16,
-  Casework = 19,
-  Columns = 21,
-  CommunicationDevices = 22,
-  ConduitFitting = 23,
-  DataDevices = 30,
-  Doors = 32,
-  DuctAccessory = 33,
-  DuctFitting = 34,
-  ElectricalEquipment = 38,
-  ElectricalFixtures = 39,
-  Entourage = 40,
-  FireAlarmDevices = 42,
-  FireProtection = 43,
-  FoodServiceEquipment = 45,
-  Furniture = 46,
-  FurnitureSystems = 47,
-  GenericModel = 49,
-  Hardscape = 51,
-  LightingDevices = 52,
-  LightingFixtures = 53,
-  Mass = 55,
-  MechanicalEquipment = 56,
-  MedicalEquipment = 57,
-  NurseCallDevices = 58,
-  Parking = 59,
-  PipeAccessory = 68,
-  PipeFitting = 69,
-  Planting = 74,
-  PlumbingFixtures = 76,
-  Roads = 80,
-  SecurityDevices = 82,
-  Signage = 84,
-  Site = 85,
-  SpecialityEquipment = 86,
-  Sprinklers = 87,
-  StructuralFramingSystem = 89,
-  StructuralColumns = 90,
-  StructConnections = 91,
-  StructuralFoundation = 93,
-  StructuralFraming = 94,
-  StructuralStiffener = 97,
-  TemporaryStructure = 100,
-  VerticalCirculation = 103,
-  Windows = 109,
-  Railings = 110,
-}
-
-public enum LocationLine
-{
-  Centerline,
-  Exterior,
-  Interior,
-}
diff --git a/src/Speckle.Objects/Data/ArcgisObject.cs b/src/Speckle.Objects/Data/ArcgisObject.cs
new file mode 100644
index 00000000..abe87aea
--- /dev/null
+++ b/src/Speckle.Objects/Data/ArcgisObject.cs
@@ -0,0 +1,22 @@
+using Speckle.Sdk.Models;
+
+namespace Speckle.Objects.Data;
+
+/// <summary>
+/// Represents a ArcGIS.Core.CoreObjectsBase object in ArcGIS
+/// </summary>
+[SpeckleType("Objects.Data.ArcgisObject")]
+public class ArcgisObject : Base, IGisObject
+{
+  public required string name { get; set; }
+  public required string type { get; set; }
+
+  [DetachProperty]
+  public required List<Base> displayValue { get; set; }
+
+  public required Dictionary<string, object?> properties { get; set; }
+
+  public required string units { get; set; }
+
+  IReadOnlyList<Base> IDisplayValue<IReadOnlyList<Base>>.displayValue => displayValue;
+}
diff --git a/src/Speckle.Objects/Data/CivilObject.cs b/src/Speckle.Objects/Data/Civil3dObject.cs
similarity index 62%
rename from src/Speckle.Objects/Data/CivilObject.cs
rename to src/Speckle.Objects/Data/Civil3dObject.cs
index f9785e5a..cad3e2fe 100644
--- a/src/Speckle.Objects/Data/CivilObject.cs
+++ b/src/Speckle.Objects/Data/Civil3dObject.cs
@@ -5,8 +5,8 @@ namespace Speckle.Objects.Data;
 /// <summary>
 /// Represents an Autodesk.Civil.DatabaseServices.Entity object in Civil3d
 /// </summary>
-[SpeckleType("Objects.Data.CivilObject")]
-public class CivilObject : Base, ICivilObject
+[SpeckleType("Objects.Data.Civil3dObject")]
+public class Civil3dObject : Base, ICivilObject
 {
   public required string name { get; set; }
   public required string type { get; set; }
@@ -20,13 +20,16 @@ public class CivilObject : Base, ICivilObject
   /// Children objects, eg profiles, this civil entity may contain.
   /// </summary>
   [DetachProperty]
-  public required List<CivilObject> elements { get; set; }
+  public required List<Base> elements { get; set; }
 
+  [DetachProperty]
   public required List<Base> displayValue { get; set; }
 
+  public required Dictionary<string, object?> properties { get; set; }
+
   public required string units { get; set; }
 
-  IReadOnlyList<ICivilObject> ICivilObject.elements => elements;
+  IReadOnlyList<Base> ICivilObject.elements => elements;
 
-  IReadOnlyList<Base> IDataObject.displayValue => displayValue;
+  IReadOnlyList<Base> IDisplayValue<IReadOnlyList<Base>>.displayValue => displayValue;
 }
diff --git a/src/Speckle.Objects/Data/DataObject.cs b/src/Speckle.Objects/Data/DataObject.cs
index 98ca4d68..baefdb03 100644
--- a/src/Speckle.Objects/Data/DataObject.cs
+++ b/src/Speckle.Objects/Data/DataObject.cs
@@ -10,5 +10,7 @@ public class DataObject : Base, IDataObject
   [DetachProperty]
   public required List<Base> displayValue { get; set; }
 
-  IReadOnlyList<Base> IDataObject.displayValue => displayValue;
+  public required Dictionary<string, object?> properties { get; set; }
+
+  IReadOnlyList<Base> IDisplayValue<IReadOnlyList<Base>>.displayValue => displayValue;
 }
diff --git a/src/Speckle.Objects/Data/EtabsObject.cs b/src/Speckle.Objects/Data/EtabsObject.cs
new file mode 100644
index 00000000..fa11940f
--- /dev/null
+++ b/src/Speckle.Objects/Data/EtabsObject.cs
@@ -0,0 +1,30 @@
+using Speckle.Sdk.Models;
+
+namespace Speckle.Objects.Data;
+
+/// <summary>
+/// Represents a wrapper object in ETABS
+/// </summary>
+[SpeckleType("Objects.Data.EtabsObject")]
+public class EtabsObject : Base, ICsiObject
+{
+  public required string name { get; set; }
+  public required string type { get; set; }
+
+  /// <summary>
+  /// Children objects, eg joints, this etabs object may contain.
+  /// </summary>
+  [DetachProperty]
+  public required List<EtabsObject> elements { get; set; }
+
+  [DetachProperty]
+  public required List<Base> displayValue { get; set; }
+
+  public required Dictionary<string, object?> properties { get; set; }
+
+  public required string units { get; set; }
+
+  IReadOnlyList<ICsiObject> ICsiObject.elements => elements;
+
+  IReadOnlyList<Base> IDisplayValue<IReadOnlyList<Base>>.displayValue => displayValue;
+}
diff --git a/src/Speckle.Objects/Data/NavisworksObject.cs b/src/Speckle.Objects/Data/NavisworksObject.cs
new file mode 100644
index 00000000..571cc286
--- /dev/null
+++ b/src/Speckle.Objects/Data/NavisworksObject.cs
@@ -0,0 +1,21 @@
+using Speckle.Sdk.Models;
+
+namespace Speckle.Objects.Data;
+
+/// <summary>
+/// Represents a "first selectable ancestor" Navisworks.ModelItem object in Navisworks
+/// </summary>
+[SpeckleType("Objects.Data.NavisworksObject")]
+public class NavisworksObject : Base, INavisworksObject
+{
+  public required string name { get; set; }
+
+  [DetachProperty]
+  public required List<Base> displayValue { get; set; }
+
+  public required Dictionary<string, object?> properties { get; set; }
+
+  public required string units { get; set; }
+
+  IReadOnlyList<Base> IDisplayValue<IReadOnlyList<Base>>.displayValue => displayValue;
+}
diff --git a/src/Speckle.Objects/Data/RevitObject.cs b/src/Speckle.Objects/Data/RevitObject.cs
index d958ace9..20238bee 100644
--- a/src/Speckle.Objects/Data/RevitObject.cs
+++ b/src/Speckle.Objects/Data/RevitObject.cs
@@ -25,11 +25,14 @@ public class RevitObject : Base, IRevitObject
   [DetachProperty]
   public required List<RevitObject> elements { get; set; }
 
+  [DetachProperty]
   public required List<Mesh> displayValue { get; set; }
 
+  public required Dictionary<string, object?> properties { get; set; }
+
   public required string units { get; set; }
 
   IReadOnlyList<IRevitObject> IRevitObject.elements => elements;
 
-  IReadOnlyList<Base> IDataObject.displayValue => displayValue;
+  IReadOnlyList<Base> IDisplayValue<IReadOnlyList<Base>>.displayValue => displayValue;
 }
diff --git a/src/Speckle.Objects/Data/TeklaObject.cs b/src/Speckle.Objects/Data/TeklaObject.cs
index dae831ca..737dbb55 100644
--- a/src/Speckle.Objects/Data/TeklaObject.cs
+++ b/src/Speckle.Objects/Data/TeklaObject.cs
@@ -17,11 +17,14 @@ public class TeklaObject : Base, ITeklaObject
   [DetachProperty]
   public required List<TeklaObject> elements { get; set; }
 
+  [DetachProperty]
   public required List<Base> displayValue { get; set; }
 
+  public required Dictionary<string, object?> properties { get; set; }
+
   public required string units { get; set; }
 
   IReadOnlyList<ITeklaObject> ITeklaObject.elements => elements;
 
-  IReadOnlyList<Base> IDataObject.displayValue => displayValue;
+  IReadOnlyList<Base> IDisplayValue<IReadOnlyList<Base>>.displayValue => displayValue;
 }
diff --git a/src/Speckle.Objects/Deprecated/LegacyV2.cs b/src/Speckle.Objects/Deprecated/LegacyV2.cs
index cac72d0b..9ec73a99 100644
--- a/src/Speckle.Objects/Deprecated/LegacyV2.cs
+++ b/src/Speckle.Objects/Deprecated/LegacyV2.cs
@@ -6,6 +6,7 @@ namespace Speckle.Objects.Deprecated;
 [DeprecatedSpeckleType("Objects.Other.BlockInstance")]
 [DeprecatedSpeckleType("Objects.Other.Revit.RevitInstance")]
 [DeprecatedSpeckleType("Objects.BuiltElements.View")]
+[DeprecatedSpeckleType("Objects.BuiltElements.GridLine")]
 [DeprecatedSpeckleType("Objects.Other.BlockDefinition")]
 [DeprecatedSpeckleType("Objects.Other.DisplayStyle")]
 [DeprecatedSpeckleType("Objects.Other.Material")]
@@ -13,4 +14,5 @@ namespace Speckle.Objects.Deprecated;
 [DeprecatedSpeckleType("Objects.Other.Revit.RevitMaterial")]
 [DeprecatedSpeckleType("Objects.BuiltElements.Revit.Parameter")]
 [DeprecatedSpeckleType("Objects.BuiltElements.Revit.Curve.ModelCurve")]
+[DeprecatedSpeckleType("Objects.BuiltElements.Revit.DirectShape")]
 public class LegacyV2 : Base { }
diff --git a/src/Speckle.Objects/Interfaces.cs b/src/Speckle.Objects/Interfaces.cs
index f22af6fc..2e9ac929 100644
--- a/src/Speckle.Objects/Interfaces.cs
+++ b/src/Speckle.Objects/Interfaces.cs
@@ -83,6 +83,29 @@ public interface ITransformable : ISpeckleObject
   bool TransformTo(Transform transform, out ITransformable transformed);
 }
 
+/// <summary>
+/// Specifies displayable <see cref="Base"/> simple geometries to be used as a fallback
+/// if a displayable form cannot be converted.
+/// </summary>
+/// <example>
+/// <see cref="Base"/> objects that represent conceptual / abstract / mathematically derived geometry
+/// can use <see cref="displayValue"/> to be used in case the object lacks a natively displayable form.
+/// (e.g <see cref="Spiral"/>)
+/// </example>
+/// <typeparam name="T">
+/// Type of display value.
+/// Expected to be either a <see cref="Base"/> type or a <see cref="List{T}"/> of <see cref="Base"/>s,
+/// Should be constrained to types of <see cref="Point"/>, <see cref="Line"/>, <see cref="Mesh"/> or <see cref="Polyline"/>.
+/// </typeparam>
+public interface IDisplayValue<out T> : ISpeckleObject
+{
+  /// <summary>
+  /// <see cref="displayValue"/> <see cref="Base"/>(s) will be used to display this <see cref="Base"/>
+  /// if a native displayable object cannot be converted.
+  /// </summary>
+  T displayValue { get; }
+}
+
 #endregion
 
 #region GIS
@@ -96,36 +119,19 @@ public interface IGisFeature : ISpeckleObject
 #region Data objects
 
 /// <summary>
-/// Specifies displayable <see cref="Base"/> value(s) to be used as a fallback
-/// if a displayable form cannot be converted.
+/// Specifies properties on objects to be used for data-based workflows
 /// </summary>
-/// <example>
-/// <see cref="Base"/> objects that represent conceptual / abstract / mathematically derived geometry
-/// can use <see cref="displayValue"/> to be used in case the object lacks a natively displayable form.
-/// (e.g <see cref="Spiral"/>)
-/// </example>
-/// <typeparam name="T">
-/// Type of display value.
-/// Expected to be either a <see cref="Base"/> type or a <see cref="List{T}"/> of <see cref="Base"/>s,
-/// most likely <see cref="Mesh"/> or <see cref="Polyline"/>.
-/// </typeparam>
-public interface IDisplayValue<out T> : ISpeckleObject
+public interface IProperties : ISpeckleObject
 {
-  /// <summary>
-  /// <see cref="displayValue"/> <see cref="Base"/>(s) will be used to display this <see cref="Base"/>
-  /// if a native displayable object cannot be converted.
-  /// </summary>
-  T displayValue { get; }
+  Dictionary<string, object?> properties { get; }
 }
 
-public interface IDataObject : ISpeckleObject
+public interface IDataObject : ISpeckleObject, IProperties, IDisplayValue<IReadOnlyList<Base>>
 {
+  /// <summary>
+  /// The name of the object, primarily used to decorate the object for consumption in frontend and other apps
+  /// </summary>
   string name { get; }
-
-  [DetachProperty]
-  IReadOnlyList<Base> displayValue { get; }
-
-  // POC: we should add "properties" field here once we formalize the struct
 }
 
 public interface IRevitObject : IDataObject
@@ -138,7 +144,6 @@ public interface IRevitObject : IDataObject
 
   Base? location { get; }
 
-  [DetachProperty]
   IReadOnlyList<IRevitObject> elements { get; }
 }
 
@@ -148,15 +153,29 @@ public interface ICivilObject : IDataObject
 
   List<ICurve>? baseCurves { get; }
 
-  [DetachProperty]
-  IReadOnlyList<ICivilObject> elements { get; }
+  IReadOnlyList<Base> elements { get; }
 }
 
 public interface ITeklaObject : IDataObject
 {
   string type { get; }
 
-  [DetachProperty]
   IReadOnlyList<ITeklaObject> elements { get; }
 }
+
+public interface ICsiObject : IDataObject
+{
+  string type { get; }
+
+  IReadOnlyList<ICsiObject> elements { get; }
+}
+
+public interface IGisObject : IDataObject
+{
+  string type { get; }
+}
+
+public interface INavisworksObject : IDataObject { }
+
+
 #endregion
diff --git a/tests/Speckle.Objects.Tests.Unit/Utils/ShallowCopyTests.cs b/tests/Speckle.Objects.Tests.Unit/Utils/ShallowCopyTests.cs
index 59abfbca..47ea8580 100644
--- a/tests/Speckle.Objects.Tests.Unit/Utils/ShallowCopyTests.cs
+++ b/tests/Speckle.Objects.Tests.Unit/Utils/ShallowCopyTests.cs
@@ -1,6 +1,6 @@
 using System.Collections;
 using NUnit.Framework;
-using Speckle.Objects.BuiltElements.Revit;
+using Speckle.Objects.Data;
 using Speckle.Objects.Geometry;
 using Speckle.Sdk.Common;
 using Speckle.Sdk.Models;
@@ -14,10 +14,9 @@ public class ShallowCopyTests
   public void CanShallowCopy_Wall()
   {
     const string UNITS = Units.Meters;
-    var ds = new DirectShape()
+    var ds = new DataObject()
     {
       name = "directShape",
-      units = UNITS,
       displayValue = new List<Base>
       {
         new Mesh
@@ -33,6 +32,7 @@ public class ShallowCopyTests
           units = UNITS,
         },
       },
+      properties = new Dictionary<string, object?>(),
     };
 
     var shallow = ds.ShallowCopy();
diff --git a/tests/Speckle.Sdk.Serialization.Tests/SerializationTests.cs b/tests/Speckle.Sdk.Serialization.Tests/SerializationTests.cs
index 3ccf593a..386e9b51 100644
--- a/tests/Speckle.Sdk.Serialization.Tests/SerializationTests.cs
+++ b/tests/Speckle.Sdk.Serialization.Tests/SerializationTests.cs
@@ -5,7 +5,7 @@ using NUnit.Framework;
 using Shouldly;
 using Speckle.Newtonsoft.Json;
 using Speckle.Newtonsoft.Json.Linq;
-using Speckle.Objects.BuiltElements;
+using Speckle.Objects.Data;
 using Speckle.Sdk.Common;
 using Speckle.Sdk.Host;
 using Speckle.Sdk.Models;
@@ -41,7 +41,7 @@ public class SerializationTests
   public void Setup()
   {
     TypeLoader.Reset();
-    TypeLoader.Initialize(typeof(Base).Assembly, typeof(GridLine).Assembly, _assembly);
+    TypeLoader.Initialize(typeof(Base).Assembly, typeof(DataObject).Assembly, _assembly);
   }
 
   private async Task<string> ReadJson(string fullName)