Index: Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.IO/Configurations/MacroStabilityInwardsCalculationConfigurationSchemaIdentifiers.cs
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diff -u -r2f8dcdec6ecf12ac329a9230d51882adc5ecd837 -raf341ae554425a1832b712c219f5eff86c5d2282
--- Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.IO/Configurations/MacroStabilityInwardsCalculationConfigurationSchemaIdentifiers.cs	(.../MacroStabilityInwardsCalculationConfigurationSchemaIdentifiers.cs)	(revision 2f8dcdec6ecf12ac329a9230d51882adc5ecd837)
+++ Ringtoets/MacroStabilityInwards/src/Ringtoets.MacroStabilityInwards.IO/Configurations/MacroStabilityInwardsCalculationConfigurationSchemaIdentifiers.cs	(.../MacroStabilityInwardsCalculationConfigurationSchemaIdentifiers.cs)	(revision af341ae554425a1832b712c219f5eff86c5d2282)
@@ -83,7 +83,31 @@
         /// </summary>
         public const string WaterLevelRiverAverageElement = "ghw";
 
+        #region Phreatic lines
+
         /// <summary>
+        /// The identifier for minimum level elements.
+        /// </summary>
+        public const string PhreaticLineMinimumLevelElement = "initielehoogte";
+
+        /// <summary>
+        /// The identifier for the phreatic line 1 elements.
+        /// </summary>
+        public const string PhreaticLine1Element = "pl1";
+
+        /// <summary>
+        /// The tag of the element containing the value indicating the minimum level phreatic line at dike top river.
+        /// </summary>
+        public const string MinimumLevelPhreaticLineAtDikeTopRiverElement = "buitenkruin";
+
+        /// <summary>
+        /// The tag of the element containing the value indicating the minimum level phreatic line at dike top polder.
+        /// </summary>
+        public const string MinimumLevelPhreaticLineAtDikeTopPolderElement = "binnenkruin";
+
+        #endregion
+
+        /// <summary>
         /// The tag of the element containing the value indicating whether phreatic line 3 and 4 should be adjusted for Uplift.
         /// </summary>
         public const string AdjustPhreaticLine3And4ForUpliftElement = "corrigeervooropbarsten";