@@ -0,0 +1,18 @@
+namespace OpenTelemetry.Exporter
+{
+    /// <summary>
+    /// Supported by OTLP exporter protocol types according to the specification https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/protocol/exporter.md.
+    /// </summary>
+    public static class ExportProtocol
+    {
+        /// <summary>
+        /// OTLP over gRPC .
+        /// </summary>
+        public const string Grpc = "grpc";
+
+        /// <summary>
+        /// OTLP over HTTP with protobuf payloads.
+        /// </summary>
+        public const string HttpProtobuf = "http/protobuf";
+    }
+}
Should we make this an enum?