From 9a8b0f323ebb8ffc2f369a3f1408f351e9dc898e Mon Sep 17 00:00:00 2001
From: Abby <78209557+abby-cyber@users.noreply.github.com>
Date: Mon, 12 Dec 2022 17:01:22 +0800
Subject: [PATCH] Update 4.schema.md

---
 .../3.ngql-guide/6.functions-and-expressions/4.schema.md  | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/docs-2.0/3.ngql-guide/6.functions-and-expressions/4.schema.md b/docs-2.0/3.ngql-guide/6.functions-and-expressions/4.schema.md
index 7517e59ff67..89a1c26d84f 100644
--- a/docs-2.0/3.ngql-guide/6.functions-and-expressions/4.schema.md
+++ b/docs-2.0/3.ngql-guide/6.functions-and-expressions/4.schema.md
@@ -114,6 +114,10 @@ nebula> GO FROM "player100" OVER follow \
 +-------------+-------------+
 ```
 
+!!! note
+
+    The semantics of the query for the starting vertex with src(edge) and [properties(`$^`)](../5.operators/5.property-reference.md) are different. src(edge) indicates the starting vertex ID of the edge in the graph database, while properties(`$^`) indicates the data of the starting vertex where you start to expand the graph, such as the data of the starting vertex `player100` in the above GO statement. 
+
 ### dst(edge)
 
 dst(edge) returns the destination vertex ID of an edge.
@@ -135,6 +139,10 @@ nebula> GO FROM "player100" OVER follow \
 +-------------+-------------+
 ```
 
+!!! note
+
+    dst(edge) indicates the destination vertex ID of the edge in the graph database.
+
 ### rank(edge)
 
 rank(edge) returns the rank value of an edge.