1 files changed, 15 insertions, 0 deletions

diff --git a/src/WixToolset.Core/IPreprocessor.cs b/src/WixToolset.Core/IPreprocessor.cs
new file mode 100644
index 00000000..946d8cc2
--- /dev/null
+++ b/src/WixToolset.Core/IPreprocessor.cs
@@ -0,0 +1,15 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Core
+{
+    using System.Xml;
+    using System.Xml.Linq;
+    using WixToolset.Extensibility.Data;
+
+    internal interface IPreprocessor
+    {
+        XDocument Preprocess(IPreprocessContext context);
+
+        XDocument Preprocess(IPreprocessContext context, XmlReader reader);
+    }
+}