Index: Ringtoets/AssemblyTool/src/Ringtoets.AssemblyTool.IO/Model/Helpers/IdValidator.cs
===================================================================
diff -u
--- Ringtoets/AssemblyTool/src/Ringtoets.AssemblyTool.IO/Model/Helpers/IdValidator.cs	(revision 0)
+++ Ringtoets/AssemblyTool/src/Ringtoets.AssemblyTool.IO/Model/Helpers/IdValidator.cs	(revision 259f662afb80263cee647a25e6cadeeb654dc41d)
@@ -0,0 +1,50 @@
+// 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.Text.RegularExpressions;
+
+namespace Ringtoets.AssemblyTool.IO.Model.Helpers
+{
+    /// <summary>
+    /// Helper to validate if an id is suitable to use as an identifier.
+    /// </summary>
+    public static class IdValidator
+    {
+        /// <summary>
+        /// Validates if <paramref name="id"/> is a valid id to be used
+        /// as an identifier in an xml context.
+        /// </summary>
+        /// <param name="id">The identifier to validate.</param>
+        /// <returns><c>true</c> if <paramref name="id"/> is valid, <c>false</c> if otherwise.</returns>
+        /// <exception cref="ArgumentNullException">Thrown when <paramref name="id"/> is <c>null</c>.</exception>
+        public static bool Validate(string id)
+        {
+            if (id == null)
+            {
+                throw new ArgumentNullException(nameof(id));
+            }
+
+            var regex = new Regex(@"^[A-Za-z\\_][A-Za-z\\_\d\-\.]+$");
+            return regex.IsMatch(id);
+        }
+    }
+}
\ No newline at end of file
Index: Ringtoets/AssemblyTool/src/Ringtoets.AssemblyTool.IO/Ringtoets.AssemblyTool.IO.csproj
===================================================================
diff -u -rd3b53b68914f5cead6eaf7b008168b29b2bd5754 -r259f662afb80263cee647a25e6cadeeb654dc41d
--- Ringtoets/AssemblyTool/src/Ringtoets.AssemblyTool.IO/Ringtoets.AssemblyTool.IO.csproj	(.../Ringtoets.AssemblyTool.IO.csproj)	(revision d3b53b68914f5cead6eaf7b008168b29b2bd5754)
+++ Ringtoets/AssemblyTool/src/Ringtoets.AssemblyTool.IO/Ringtoets.AssemblyTool.IO.csproj	(.../Ringtoets.AssemblyTool.IO.csproj)	(revision 259f662afb80263cee647a25e6cadeeb654dc41d)
@@ -33,6 +33,7 @@
     <Compile Include="Model\Gml\SerializableEnvelope.cs" />
     <Compile Include="Model\Gml\SerializableBoundary.cs" />
     <Compile Include="Model\Helpers\GeometrySerializationFormatter.cs" />
+    <Compile Include="Model\Helpers\IdValidator.cs" />
     <Compile Include="Model\SerializableFailureMechanismSection.cs" />
     <Compile Include="Model\SerializableCombinedFailureMechanismSectionAssembly.cs" />
     <Compile Include="Model\SerializableFailureMechanismSectionCollection.cs" />
Index: Ringtoets/AssemblyTool/test/Ringtoets.AssemblyTool.IO.Test/Model/Helpers/IdValidatorTest.cs
===================================================================
diff -u
--- Ringtoets/AssemblyTool/test/Ringtoets.AssemblyTool.IO.Test/Model/Helpers/IdValidatorTest.cs	(revision 0)
+++ Ringtoets/AssemblyTool/test/Ringtoets.AssemblyTool.IO.Test/Model/Helpers/IdValidatorTest.cs	(revision 259f662afb80263cee647a25e6cadeeb654dc41d)
@@ -0,0 +1,79 @@
+// 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 NUnit.Framework;
+using Ringtoets.AssemblyTool.IO.Model.Helpers;
+
+namespace Ringtoets.AssemblyTool.IO.Test.Model.Helpers
+{
+    [TestFixture]
+    public class IdValidatorTest
+    {
+        [Test]
+        public void Validate_IdNull_ThrowsArgumentNullException()
+        {
+            // Call
+            TestDelegate call = () => IdValidator.Validate(null);
+
+            // Assert
+            var exception = Assert.Throws<ArgumentNullException>(call);
+            Assert.AreEqual("input", exception.ParamName);
+        }
+
+        [Test]
+        [TestCase("AValidId1-2.3")]
+        [TestCase("_AValidId1-2.3")]
+        [TestCase("aValidId1-2.3")]
+        public void Validate_WithValidIds_ReturnsTrue(string validId)
+        {
+            // Call
+            bool result = IdValidator.Validate(validId);
+
+            // Assert
+            Assert.IsTrue(result);
+        }
+
+        [Test]
+        [TestCase("-invalidId1-2.3")]
+        [TestCase("1nvalidId1-2.3")]
+        [TestCase(".invalidId1-2.3")]
+        [TestCase("invalidId#")]
+        [TestCase("invalid#Id")]
+        [TestCase("#invalidId")]
+        [TestCase("i nvalidId")]
+        [TestCase(" invalidId")]
+        [TestCase("invalidId ")]
+        [TestCase("i\rnvalidId")]
+        [TestCase("\rinvalidId")]
+        [TestCase("invalidId\r")]
+        [TestCase("")]
+        [TestCase("  ")]
+        public void Validate_WithInvalidIds_ReturnsFalse(string invalidId)
+        {
+            // Call
+            bool result = IdValidator.Validate(invalidId);
+
+            // Assert
+            Assert.IsFalse(result);
+        }
+    }
+}
\ No newline at end of file
Index: Ringtoets/AssemblyTool/test/Ringtoets.AssemblyTool.IO.Test/Ringtoets.AssemblyTool.IO.Test.csproj
===================================================================
diff -u -r1ea93714d7063df84c6ecf043209ef821ca54a70 -r259f662afb80263cee647a25e6cadeeb654dc41d
--- Ringtoets/AssemblyTool/test/Ringtoets.AssemblyTool.IO.Test/Ringtoets.AssemblyTool.IO.Test.csproj	(.../Ringtoets.AssemblyTool.IO.Test.csproj)	(revision 1ea93714d7063df84c6ecf043209ef821ca54a70)
+++ Ringtoets/AssemblyTool/test/Ringtoets.AssemblyTool.IO.Test/Ringtoets.AssemblyTool.IO.Test.csproj	(.../Ringtoets.AssemblyTool.IO.Test.csproj)	(revision 259f662afb80263cee647a25e6cadeeb654dc41d)
@@ -31,6 +31,7 @@
     <Compile Include="Model\Enums\SerializableFailureMechanismGroupTest.cs" />
     <Compile Include="Model\Enums\SerializableFailureMechanismCategoryGroupTest.cs" />
     <Compile Include="Model\Helpers\GeometrySerializationFormatterTest.cs" />
+    <Compile Include="Model\Helpers\IdValidatorTest.cs" />
     <Compile Include="Model\SerializableCombinedFailureMechanismSectionAssemblyTest.cs" />
     <Compile Include="Model\SerializableFailureMechanismSectionTest.cs" />
     <Compile Include="Model\SerializableFailureMechanismSectionCollectionTest.cs" />