diff --git a/docs-2.0/3.ngql-guide/4.variable-and-composite-queries/3.property-reference.md b/docs-2.0/3.ngql-guide/4.variable-and-composite-queries/3.property-reference.md
index 38fc8257b54..61b86a20149 100644
--- a/docs-2.0/3.ngql-guide/4.variable-and-composite-queries/3.property-reference.md
+++ b/docs-2.0/3.ngql-guide/4.variable-and-composite-queries/3.property-reference.md
@@ -60,29 +60,42 @@ $$.<tag_name>.<prop_name>
 
 ```ngql
 # 返回起始点的Tag player的name属性值和目的点的Tag player的age属性值。
-nebula> GO FROM "player100" OVER follow YIELD properties($^).name AS startName, properties($$).age AS endAge;
+nebula> GO FROM "player100" OVER follow YIELD $^.player.name AS startName, $$.player.age AS endAge;
 +--------------+--------+
 | startName    | endAge |
 +--------------+--------+
 | "Tim Duncan" | 36     |
-| "Tim Duncan" | 33     |
+| "Tim Duncan" | 41     |
 +--------------+--------+
 
+
 # 返回Edge type follow的degree属性值。
-nebula> GO FROM "player100" OVER follow YIELD properties(edge).degree;
+nebula> GO FROM "player100" OVER follow YIELD follow.degree;
 +---------------+
 | follow.degree |
 +---------------+
 | 95            |
-| 90            |
+| 95            |
 +---------------+
 
 # 返回EdgeType 是 follow 的起始点 VID、目的点 VID、EdgeType 编码(正数为正向边，负数为逆向边)，和边的 rank 值。
-nebula> GO FROM "player100" OVER follow YIELD src(edge), dst(edge), type(edge), rank(edge);
-+-------------+-------------+------------+------------+
-| src(EDGE)   | dst(EDGE)   | type(EDGE) | rank(EDGE) |
-+-------------+-------------+------------+------------+
-| "player100" | "player101" | "follow"   | 0          |
-| "player100" | "player125" | "follow"   | 0          |
-+-------------+-------------+------------+------------+
+nebula> GO FROM "player100" OVER follow YIELD follow._src, follow._dst, follow._type, follow._rank;
++-------------+-------------+--------------+--------------+
+| follow._src | follow._dst | follow._type | follow._rank |
++-------------+-------------+--------------+--------------+
+| "player100" | "player101" | 17           | 0            |
+| "player100" | "player125" | 17           | 0            |
++-------------+-------------+--------------+--------------+
 ```
+
+!!! compatibility "历史版本兼容性"
+
+    Nebula Graph 2.6.0起支持了新的[Schema函数](../6.functions-and-expressions/4.schema.md)，以上示例中的语句在2.6.0版本中的写法如下。
+    
+    ```ngql
+    GO FROM "player100" OVER follow YIELD properties($^).name AS startName, properties($$).age AS endAge;
+    GO FROM "player100" OVER follow YIELD properties(edge).degree;
+    GO FROM "player100" OVER follow YIELD src(edge), dst(edge), type(edge), rank(edge);
+    ```
+
+    在2.6.0版本中Nebula Graph依然兼容旧语法。