diff --git a/src/libraries/Microsoft.PowerFx.Core/AssemblyProperties.cs b/src/libraries/Microsoft.PowerFx.Core/AssemblyProperties.cs
index 2f807e13e8..505025fcc2 100644
--- a/src/libraries/Microsoft.PowerFx.Core/AssemblyProperties.cs
+++ b/src/libraries/Microsoft.PowerFx.Core/AssemblyProperties.cs
@@ -44,3 +44,6 @@
 [assembly: InternalsVisibleTo("Microsoft.PowerFx.Json.Tests, PublicKey=0024000004800000940000000602000000240000525341310004000001000100b5fc90e7027f67871e773a8fde8938c81dd402ba65b9201d60593e96c492651e889cc13f1415ebb53fac1131ae0bd333c5ee6021672d9718ea31a8aebd0da0072f25d87dba6fc90ffd598ed4da35e44c398c454307e8e33b8426143daec9f596836f97c8f74750e5975c64e2189f45def46b2a2b1247adc3652bf5c308055da9")]
 
 [assembly: NeutralResourcesLanguage("en-US", UltimateResourceFallbackLocation.Satellite)]
+
+// PiFlows Server
+[assembly: InternalsVisibleTo("Berry.PiFlow.Server, PublicKey=0024000004800000940000000602000000240000525341310004000001000100013b46091645a2e69cb6b4793aa9d1603c26d9a9723a68036913d487c51ce7bc1ad3ba01e42d2d88e57620515beb899b3aec91e0bc7ff97bf64b883917170c6b1360b51a2056a302db97fc425c5f26c1b7a875f3780e226b62bfc5599090e8d0eee028d40af84fc9049f8def05357ce0c38c807bd52b79d7d23d2ffb654cd6b7")]
\ No newline at end of file
diff --git a/src/libraries/Microsoft.PowerFx.Core/Public/CheckResult.cs b/src/libraries/Microsoft.PowerFx.Core/Public/CheckResult.cs
index 0e3a25d145..5ed85f2a2c 100644
--- a/src/libraries/Microsoft.PowerFx.Core/Public/CheckResult.cs
+++ b/src/libraries/Microsoft.PowerFx.Core/Public/CheckResult.cs
@@ -240,12 +240,14 @@ internal TexlBinding Binding
             }
         }
 
+#pragma warning disable CS1574, CS1584, CS1581, CS1580
         /// <summary>
         /// List of all errors and warnings. Check <see cref="ExpressionError.IsWarning"/>.
         /// This can include Parse, Bind, and per-engine custom errors (see <see cref="Engine.PostCheck(CheckResult)"/>, 
         /// or any custom errors passes explicit to the ctor.
         /// Not null, but empty on success.
         /// </summary>
+#pragma warning restore CS1574, CS1584, CS1581, CS1580
         public IEnumerable<ExpressionError> Errors
         {
             get => GetErrorsInLocale(null);
@@ -450,12 +452,14 @@ public void ApplyDependencyAnalysis()
 
         // Flag to ensure Post Checks are only invoked once. 
         private bool _invokingPostCheck;
-
+        
+#pragma warning disable CS1574, CS1584, CS1581, CS1580
         /// <summary>
         /// Calculate all errors. 
         /// Invoke Binding and any engine-specific errors via <see cref="Engine.PostCheck(CheckResult)"/>. 
         /// </summary>
         /// <returns></returns>
+#pragma warning restore CS1574, CS1584, CS1581, CS1580
         public IEnumerable<ExpressionError> ApplyErrors()
         {
             if (!_invokingPostCheck)
diff --git a/src/libraries/Microsoft.PowerFx.Core/Types/FunctionCategories.cs b/src/libraries/Microsoft.PowerFx.Core/Types/FunctionCategories.cs
index dad4feb5e8..ab82faddde 100644
--- a/src/libraries/Microsoft.PowerFx.Core/Types/FunctionCategories.cs
+++ b/src/libraries/Microsoft.PowerFx.Core/Types/FunctionCategories.cs
@@ -8,7 +8,9 @@ namespace Microsoft.PowerFx.Core.Types
 {
     [Flags]
     [TransportType(TransportKind.Enum)]
-    internal enum FunctionCategories : uint
+#pragma warning disable CA1028
+    public enum FunctionCategories : uint
+#pragma warning restore CA1028
     {
         None = 0x0,
         Text = 0x1,
@@ -20,6 +22,7 @@ internal enum FunctionCategories : uint
         Information = 0x40,
         Color = 0x80,
         REST = 0x100,
-        Component = 0x200
+        Component = 0x200,
+        PiFlow = 0x400
     }
 }
diff --git a/src/libraries/Microsoft.PowerFx.Interpreter/AssemblyProperties.cs b/src/libraries/Microsoft.PowerFx.Interpreter/AssemblyProperties.cs
index e38a3d5544..22fa4aa6a6 100644
--- a/src/libraries/Microsoft.PowerFx.Interpreter/AssemblyProperties.cs
+++ b/src/libraries/Microsoft.PowerFx.Interpreter/AssemblyProperties.cs
@@ -5,3 +5,6 @@
 
 [assembly: InternalsVisibleTo("Microsoft.PowerFx.Interpreter.Tests, PublicKey=0024000004800000940000000602000000240000525341310004000001000100b5fc90e7027f67871e773a8fde8938c81dd402ba65b9201d60593e96c492651e889cc13f1415ebb53fac1131ae0bd333c5ee6021672d9718ea31a8aebd0da0072f25d87dba6fc90ffd598ed4da35e44c398c454307e8e33b8426143daec9f596836f97c8f74750e5975c64e2189f45def46b2a2b1247adc3652bf5c308055da9")]
 [assembly: InternalsVisibleTo("Microsoft.PowerFx.Connectors, PublicKey=0024000004800000940000000602000000240000525341310004000001000100b5fc90e7027f67871e773a8fde8938c81dd402ba65b9201d60593e96c492651e889cc13f1415ebb53fac1131ae0bd333c5ee6021672d9718ea31a8aebd0da0072f25d87dba6fc90ffd598ed4da35e44c398c454307e8e33b8426143daec9f596836f97c8f74750e5975c64e2189f45def46b2a2b1247adc3652bf5c308055da9")]
+
+// PiFlows Server
+[assembly: InternalsVisibleTo("Berry.PiFlow.Server, PublicKey=0024000004800000940000000602000000240000525341310004000001000100013b46091645a2e69cb6b4793aa9d1603c26d9a9723a68036913d487c51ce7bc1ad3ba01e42d2d88e57620515beb899b3aec91e0bc7ff97bf64b883917170c6b1360b51a2056a302db97fc425c5f26c1b7a875f3780e226b62bfc5599090e8d0eee028d40af84fc9049f8def05357ce0c38c807bd52b79d7d23d2ffb654cd6b7")]
diff --git a/src/libraries/Microsoft.PowerFx.Interpreter/ParsedExpression.cs b/src/libraries/Microsoft.PowerFx.Interpreter/ParsedExpression.cs
index fde3ff2084..616c02e7d0 100644
--- a/src/libraries/Microsoft.PowerFx.Interpreter/ParsedExpression.cs
+++ b/src/libraries/Microsoft.PowerFx.Interpreter/ParsedExpression.cs
@@ -19,6 +19,8 @@ namespace Microsoft.PowerFx
     /// </summary>
     public interface IExpressionEvaluator
     {
+        ReadOnlySymbolValues NewFromRecordValue(RecordValue recordValue = null);
+        
         public Task<FormulaValue> EvalAsync(CancellationToken cancellationToken, IRuntimeConfig runtimeConfig = null);
     }
 
@@ -137,6 +139,9 @@ async Task<FormulaValue> IExpression.EvalAsync(RecordValue parameters, Cancellat
             }
         }
 
+        public ReadOnlySymbolValues NewFromRecordValue(RecordValue recordValue = null) =>
+            ReadOnlySymbolValues.NewFromRecord(_parameterSymbolTable, recordValue);
+
         public async Task<FormulaValue> EvalAsync(CancellationToken cancellationToken, IRuntimeConfig runtimeConfig = null)
         {
             ReadOnlySymbolValues symbolValues = ComposedReadOnlySymbolValues.New(
diff --git a/src/libraries/Microsoft.PowerFx.Interpreter/ReflectionFunction.cs b/src/libraries/Microsoft.PowerFx.Interpreter/ReflectionFunction.cs
index 51520a750a..cc0fe0ce1c 100644
--- a/src/libraries/Microsoft.PowerFx.Interpreter/ReflectionFunction.cs
+++ b/src/libraries/Microsoft.PowerFx.Interpreter/ReflectionFunction.cs
@@ -45,6 +45,26 @@ public CustomTexlFunction(string name, DType returnType, params DType[] paramTyp
         {
         }
 
+        protected CustomTexlFunction(
+            string name,
+            string description,
+            FunctionCategories functionCategories,
+            FormulaType returnType,
+            params FormulaType[] paramTypes)
+            : base(
+                DPath.Root, 
+                name,
+                name,
+                SG(description),
+                functionCategories,
+                returnType._type,
+                0,
+                paramTypes.Length,
+                paramTypes.Length,
+                Array.ConvertAll(paramTypes, p => p._type))
+        {
+        }
+
         public override bool IsSelfContained => true;
 
         public static StringGetter SG(string text)
@@ -137,7 +157,7 @@ public async Task<FormulaValue> InvokeAsync(FormulaValue[] args, CancellationTok
             return await result;
         }
     }
-
+    
     /// <summary>
     /// Base class for importing a C# function into Power Fx. 
     /// Dervied class should follow this convention: