Why can data be saved to undefined timeseries

[TimXu0713]

Hi,all:

I have only recently started to use IoTDB. I executed the following SQL statement. I would like to ask some questions.

IoTDB> SET STORAGE GROUP TO root.wx.111.vcp_vcp_su001
IoTDB> show storage group
+-------------------------+
|            storage group|
+-------------------------+
|root.wx.111.vcp_vcp_su001|
|                  root.ln|

IoTDB> create timeseries root.wx.111.vcp_vcp_su001.AC126352-1.status with datatype=boolean,encoding=plain
Msg: The statement is executed successfully.

IoTDB> insert into root.wx.111.vcp_vcp_su001.AC126352-1(timestamp,status) values(109218120301,true);
Msg: The statement is executed successfully.
IoTDB> insert into root.wx.111.vcp_vcp_su001(timestamp,status) values(393939399393,false);
Msg: The statement is executed successfully.

Why the second insert sql can been executed successfully? And these sql can also been success:

IoTDB> insert into root.a.aaa(timestamp,a) values(1101010,1);
Msg: The statement is executed successfully.
IoTDB> select * from root.a
+-----------------------------+------------+
|                         Time|root.a.aaa.a|
+-----------------------------+------------+
|1970-01-01T08:18:21.010+08:00|         1.0|
+-----------------------------+------------+
Total line number = 1
It costs 0.009s
IoTDB> show storage group
+-------------------------+
|            storage group|
+-------------------------+
|root.wx.111.vcp_vcp_su001|
|                   root.a|
|                  root.ln|
+-------------------------+
Total line number = 3
It costs 0.004s
IoTDB> insert into root.a(timestamp,a) values(1101010,1);
Msg: The statement is executed successfully.
IoTDB> select * from root.a
+-----------------------------+------------+--------+
|                         Time|root.a.aaa.a|root.a.a|
+-----------------------------+------------+--------+
|1970-01-01T08:18:21.010+08:00|         1.0|     1.0|
+-----------------------------+------------+--------+
Total line number = 1
It costs 0.010s

Is IoTDB not mandatory schema verification?

[TimXu0713]

Sorry,after reading the official document, I have understood it.

[qiaojialin]

IoTDB could auto-create schema based on the value inserted.