Index: Ringtoets/Common/src/Ringtoets.Common.Data/IllustrationPoints/FaultTreeIllustrationPointNode.cs
===================================================================
diff -u
--- Ringtoets/Common/src/Ringtoets.Common.Data/IllustrationPoints/FaultTreeIllustrationPointNode.cs	(revision 0)
+++ Ringtoets/Common/src/Ringtoets.Common.Data/IllustrationPoints/FaultTreeIllustrationPointNode.cs	(revision 6d60c1b06ad01314179bc7d953765e46a41b841c)
@@ -0,0 +1,88 @@
+// Copyright (C) Stichting Deltares 2017. All rights reserved.
+//
+// This file is part of Ringtoets.
+//
+// Ringtoets is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+// All names, logos, and references to "Deltares" are registered trademarks of
+// Stichting Deltares and remain full property of Stichting Deltares at all times.
+// All rights reserved.
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using Ringtoets.Common.Data.Properties;
+
+namespace Ringtoets.Common.Data.IllustrationPoints
+{
+    /// <summary>
+    /// A node with attached illustration point data that is part of a tree. Multiple
+    /// nodes form the tree structure describing how the illustration points are related.
+    /// </summary>
+    public class FaultTreeIllustrationPointNode
+    {
+        /// <summary>
+        /// Creates a new node with associated data.
+        /// </summary>
+        /// <param name="data">The illustration point data that is attached
+        /// to this node.</param>
+        /// <exception cref="ArgumentNullException">Thrown when <paramref name="data"/>
+        /// is <c>null</c>.</exception>
+        public FaultTreeIllustrationPointNode(IllustrationPointBase data)
+        {
+            if (data == null)
+            {
+                throw new ArgumentNullException(nameof(data));
+            }
+
+            Data = data;
+        }
+
+        /// <summary>
+        /// Gets the attached illustration point data to this node.
+        /// </summary>
+        public IllustrationPointBase Data { get; }
+
+        /// <summary>
+        /// Gets the attached child nodes of this node.
+        /// </summary>
+        public IEnumerable<FaultTreeIllustrationPointNode> Children { get; private set; }
+            = Enumerable.Empty<FaultTreeIllustrationPointNode>();
+
+        /// <summary>
+        /// Sets the children to this node.
+        /// </summary>
+        /// <param name="children">The children that are attached to this node.</param>
+        /// <exception cref="ArgumentException">Thrown when <paramref name="children"/>
+        /// does not contain 0 or 2 elements.</exception>
+        public void SetChildren(FaultTreeIllustrationPointNode[] children)
+        {
+            if (children == null)
+            {
+                throw new ArgumentNullException(nameof(children));
+            }
+
+            int nrOfChildren = children.Length;
+            if (nrOfChildren == 0 || nrOfChildren == 2)
+            {
+                Children = children;
+            }
+            else
+            {
+                throw new ArgumentException(Resources.FaultTreeIllustrationPointNode_SetChildren_Node_must_have_zero_or_two_child_nodes,
+                                            nameof(children));
+            }
+        }
+    }
+}
\ No newline at end of file
Index: Ringtoets/Common/src/Ringtoets.Common.Data/Properties/Resources.Designer.cs
===================================================================
diff -u -r7f4eb38b0c9023e8a66cbce632cd10a16ef9e4bb -r6d60c1b06ad01314179bc7d953765e46a41b841c
--- Ringtoets/Common/src/Ringtoets.Common.Data/Properties/Resources.Designer.cs	(.../Resources.Designer.cs)	(revision 7f4eb38b0c9023e8a66cbce632cd10a16ef9e4bb)
+++ Ringtoets/Common/src/Ringtoets.Common.Data/Properties/Resources.Designer.cs	(.../Resources.Designer.cs)	(revision 6d60c1b06ad01314179bc7d953765e46a41b841c)
@@ -391,6 +391,16 @@
         }
         
         /// <summary>
+        ///   Looks up a localized string similar to Een illustratiepunt node in de foutenboom moet 0 of 2 kind nodes hebben..
+        /// </summary>
+        public static string FaultTreeIllustrationPointNode_SetChildren_Node_must_have_zero_or_two_child_nodes {
+            get {
+                return ResourceManager.GetString("FaultTreeIllustrationPointNode_SetChildren_Node_must_have_zero_or_two_child_nodes" +
+                        "", resourceCulture);
+            }
+        }
+        
+        /// <summary>
         ///   Looks up a localized string similar to Een punt in de geometrie voor het voorlandprofiel heeft geen waarde..
         /// </summary>
         public static string ForeshoreProfile_SetGeometry_A_point_in_the_collection_is_null {
Index: Ringtoets/Common/src/Ringtoets.Common.Data/Properties/Resources.resx
===================================================================
diff -u -r7f4eb38b0c9023e8a66cbce632cd10a16ef9e4bb -r6d60c1b06ad01314179bc7d953765e46a41b841c
--- Ringtoets/Common/src/Ringtoets.Common.Data/Properties/Resources.resx	(.../Resources.resx)	(revision 7f4eb38b0c9023e8a66cbce632cd10a16ef9e4bb)
+++ Ringtoets/Common/src/Ringtoets.Common.Data/Properties/Resources.resx	(.../Resources.resx)	(revision 6d60c1b06ad01314179bc7d953765e46a41b841c)
@@ -303,4 +303,7 @@
   <data name="WindDirection_WindDirectionAngle_Value_needs_to_be_in_Range_0_" xml:space="preserve">
     <value>De waarde voor de windrichting moet in het bereik {0} liggen.</value>
   </data>
+  <data name="FaultTreeIllustrationPointNode_SetChildren_Node_must_have_zero_or_two_child_nodes" xml:space="preserve">
+    <value>Een illustratiepunt node in de foutenboom moet 0 of 2 kind nodes hebben.</value>
+  </data>
 </root>
\ No newline at end of file
Index: Ringtoets/Common/src/Ringtoets.Common.Data/Ringtoets.Common.Data.csproj
===================================================================
diff -u -ra82f053cd598d56bb1b7b8df663d104d7b9c1214 -r6d60c1b06ad01314179bc7d953765e46a41b841c
--- Ringtoets/Common/src/Ringtoets.Common.Data/Ringtoets.Common.Data.csproj	(.../Ringtoets.Common.Data.csproj)	(revision a82f053cd598d56bb1b7b8df663d104d7b9c1214)
+++ Ringtoets/Common/src/Ringtoets.Common.Data/Ringtoets.Common.Data.csproj	(.../Ringtoets.Common.Data.csproj)	(revision 6d60c1b06ad01314179bc7d953765e46a41b841c)
@@ -69,6 +69,7 @@
     <Compile Include="Hydraulics\HydraulicBoundaryLocationOutput.cs" />
     <Compile Include="IllustrationPoints\CombinationType.cs" />
     <Compile Include="IllustrationPoints\FaultTreeIllustrationPoint.cs" />
+    <Compile Include="IllustrationPoints\FaultTreeIllustrationPointNode.cs" />
     <Compile Include="IllustrationPoints\GeneralResultSubMechanismIllustrationPoint.cs" />
     <Compile Include="IllustrationPoints\GeneralResultSubMechanismIllustrationPointExtensions.cs" />
     <Compile Include="IllustrationPoints\IllustrationPointBase.cs" />
Index: Ringtoets/Common/test/Ringtoets.Common.Data.Test/IllustrationPoints/FaultTreeIllustrationPointNodeTest.cs
===================================================================
diff -u
--- Ringtoets/Common/test/Ringtoets.Common.Data.Test/IllustrationPoints/FaultTreeIllustrationPointNodeTest.cs	(revision 0)
+++ Ringtoets/Common/test/Ringtoets.Common.Data.Test/IllustrationPoints/FaultTreeIllustrationPointNodeTest.cs	(revision 6d60c1b06ad01314179bc7d953765e46a41b841c)
@@ -0,0 +1,132 @@
+// Copyright (C) Stichting Deltares 2017. All rights reserved.
+//
+// This file is part of Ringtoets.
+//
+// Ringtoets is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+// All names, logos, and references to "Deltares" are registered trademarks of
+// Stichting Deltares and remain full property of Stichting Deltares at all times.
+// All rights reserved.
+
+using System;
+using System.Collections.Generic;
+using Core.Common.TestUtil;
+using NUnit.Framework;
+using Ringtoets.Common.Data.IllustrationPoints;
+
+namespace Ringtoets.Common.Data.Test.IllustrationPoints
+{
+    [TestFixture]
+    public class FaultTreeIllustrationPointNodeTest
+    {
+        [Test]
+        public void Constructor_DataNull_ThrowsArgumentNullException()
+        {
+            // Call
+            TestDelegate call = () => new FaultTreeIllustrationPointNode(null);
+
+            // Assert
+            var exception = Assert.Throws<ArgumentNullException>(call);
+            Assert.AreEqual("data", exception.ParamName);
+        }
+
+        [Test]
+        public void Constructor_ValidArguments_ReturnExpectedValues()
+        {
+            // Setup
+            var data = new TestIllustrationPoint();
+
+            // Call
+            var faultTreeNode = new FaultTreeIllustrationPointNode(data);
+
+            // Assert
+            Assert.AreSame(data, faultTreeNode.Data);
+            Assert.IsEmpty(faultTreeNode.Children);
+        }
+
+        [Test]
+        public void SetChildren_ChildrenNull_ThrowsArgumentNullException()
+        {
+            // Setup
+            var faultTreeNode = new FaultTreeIllustrationPointNode(new TestIllustrationPoint());
+
+            // Call
+            TestDelegate call = () => faultTreeNode.SetChildren(null);
+
+            // Assert
+            var exception = Assert.Throws<ArgumentNullException>(call);
+            Assert.AreEqual("children", exception.ParamName);
+        }
+
+        [Test]
+        [TestCase(1)]
+        [TestCase(3)]
+        public void SetChildren_InvalidNrOfChildren_ThrowsInvalidArgumentException(int nrOfChildren)
+        {
+            // Setup
+            var faultTreeNode = new FaultTreeIllustrationPointNode(new TestIllustrationPoint());
+
+            var childrenToBeAttached = new List<FaultTreeIllustrationPointNode>();
+            for (var i = 0; i < nrOfChildren; i++)
+            {
+                childrenToBeAttached.Add(new FaultTreeIllustrationPointNode(new TestIllustrationPoint()));
+            }
+
+            // Call
+            TestDelegate call = () => faultTreeNode.SetChildren(childrenToBeAttached.ToArray());
+
+            // Assert
+            const string expectedMessage = "Een illustratiepunt node in de foutenboom moet 0 of 2 kind nodes hebben.";
+            var exception = TestHelper.AssertThrowsArgumentExceptionAndTestMessage<ArgumentException>(call, expectedMessage);
+            Assert.AreEqual("children", exception.ParamName);
+        }
+
+        [Test]
+        public void SetChildren_NoChildren_ReturnsExpectedProperties()
+        {
+            // Setup
+            var faultTreeNode = new FaultTreeIllustrationPointNode(new TestIllustrationPoint());
+
+            // Call
+            faultTreeNode.SetChildren(new FaultTreeIllustrationPointNode[0]);
+
+            // Assert
+            CollectionAssert.IsEmpty(faultTreeNode.Children);
+        }
+
+        [Test]
+        public void SetChildren_TwoChildren_ReturnsExpectedProperties()
+        {
+            // Setup
+            var faultTreeNode = new FaultTreeIllustrationPointNode(new TestIllustrationPoint());
+
+            var childrenToBeAttached = new[]
+            {
+                new FaultTreeIllustrationPointNode(new TestIllustrationPoint()),
+                new FaultTreeIllustrationPointNode(new TestIllustrationPoint())
+            };
+
+            // Call
+            faultTreeNode.SetChildren(childrenToBeAttached);
+
+            // Assert
+            CollectionAssert.AreEqual(childrenToBeAttached, faultTreeNode.Children);
+        }
+
+        private class TestIllustrationPoint : IllustrationPointBase
+        {
+            public TestIllustrationPoint() : base("illustration point element", 3.14) {}
+        }
+    }
+}
\ No newline at end of file
Index: Ringtoets/Common/test/Ringtoets.Common.Data.Test/Ringtoets.Common.Data.Test.csproj
===================================================================
diff -u -r1f8455066f5be4241f587c34283f1d7f8a85f78e -r6d60c1b06ad01314179bc7d953765e46a41b841c
--- Ringtoets/Common/test/Ringtoets.Common.Data.Test/Ringtoets.Common.Data.Test.csproj	(.../Ringtoets.Common.Data.Test.csproj)	(revision 1f8455066f5be4241f587c34283f1d7f8a85f78e)
+++ Ringtoets/Common/test/Ringtoets.Common.Data.Test/Ringtoets.Common.Data.Test.csproj	(.../Ringtoets.Common.Data.Test.csproj)	(revision 6d60c1b06ad01314179bc7d953765e46a41b841c)
@@ -79,6 +79,7 @@
     <Compile Include="Hydraulics\HydraulicBoundaryLocationCalculationTest.cs" />
     <Compile Include="Hydraulics\HydraulicBoundaryLocationOutputTest.cs" />
     <Compile Include="Hydraulics\HydraulicBoundaryLocationTest.cs" />
+    <Compile Include="IllustrationPoints\FaultTreeIllustrationPointNodeTest.cs" />
     <Compile Include="IllustrationPoints\FaultTreeIllustrationPointTest.cs" />
     <Compile Include="IllustrationPoints\GeneralResultSubMechanismIllustrationPointExtensionsTest.cs" />
     <Compile Include="IllustrationPoints\GeneralResultSubMechanismIllustrationPointTest.cs" />