From 423549f2af1b3b684efce7e17800156a7e2475da Mon Sep 17 00:00:00 2001
From: Sangwan Kwon <sangwan.kwon@samsung.com>
Date: Fri, 28 Feb 2020 16:43:48 +0900
Subject: [PATCH] Add description to architecture section

Signed-off-by: Sangwan Kwon <sangwan.kwon@samsung.com>
---
 README.md | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/README.md b/README.md
index c2030f2..672c23a 100644
--- a/README.md
+++ b/README.md
@@ -63,6 +63,11 @@ ViST takes below features.
 - Runtime policy plugin
 
 # Architecture
+ViST adopts 3-tier layerd architecture to separate of concern.
+- Interface layer: Provide API to client to generate query
+- Service layer: Parse the query and bind query to virtual table
+- Logic layer: Include callback routine about virtual table executed via query 
+
 <img src="https://github.sec.samsung.net/storage/user/692/files/6829c580-5a46-11ea-86d5-4091ecdfc1ea" alt="layered architecture" width="780" height="610">
 
 # Design
-- 
2.34.1