diff --git a/rules/S3921/plsql/rule.adoc b/rules/S3921/plsql/rule.adoc
index c9f93abadff..6b6f01f59d3 100644
--- a/rules/S3921/plsql/rule.adoc
+++ b/rules/S3921/plsql/rule.adoc
@@ -2,41 +2,61 @@
 
 Trying to assign a large character value to a smaller variable or column will raise an error.
 
-=== Noncompliant code example
+include::../../../shared_content/plsql/data_dictionary.adoc[]
 
-[source,sql]
-----
-create table persons (id number, name varchar2(4));
+== How to fix it
 
-insert into persons (id, name) values (1, 'Alice'); -- Noncompliant, raises ORA-12899
+Ensure that the size of the variable or column is large enough to hold the value.
 
-create or replace procedure sp1
-is 
-  foo varchar2(2);
-begin
-  select name into foo from persons where id = 1; -- Noncompliant, may raise ORA-06502
-end;
-----
+=== Code examples
 
-=== Compliant solution
+==== Noncompliant code example
 
-[source,sql]
+[source,sql,diff-id=1,diff-type=noncompliant]
+----
+CREATE TABLE Persons
+(
+  Id   NUMBER,
+  Name VARCHAR2(4)
+);
+
+INSERT INTO Persons (Id, Name) VALUES (1, 'Alice'); -- Noncompliant, raises ORA-12899
+
+CREATE OR REPLACE PROCEDURE sp1
+IS
+  foo VARCHAR2(2);
+BEGIN
+  SELECT Name INTO foo FROM Persons WHERE Id = 1; -- Noncompliant, may raise ORA-06502
+END;
 ----
-create table persons (id number, name varchar2(8));
 
-insert into persons (id, name) values (1, 'Alice');
+==== Compliant solution
 
-create or replace procedure sp1
-is 
-  foo varchar2(8);
-begin
-  select name into foo from persons where id = 1;
-end;
+[source,sql,diff-id=1,diff-type=compliant]
+----
+CREATE TABLE Persons
+(
+  Id   NUMBER,
+  Name VARCHAR2(8)
+);
+
+INSERT INTO Persons (Id, Name) VALUES (1, 'Alice');
+
+CREATE OR REPLACE PROCEDURE sp1
+IS
+  foo VARCHAR2(8);
+BEGIN
+  SELECT Name INTO foo FROM Persons WHERE Id = 1;
+END;
 ----
 
 == Resources
 
+=== Documentation
+
 * CWE - https://cwe.mitre.org/data/definitions/704[CWE-704 - Incorrect Type Conversion or Cast]
+* Oracle Database - https://docs.oracle.com/en/error-help/db/ora-12899[ORA-12899]
+* Oracle Database - https://docs.oracle.com/en/error-help/db/ora-06502[ORA-06502]
 
 
 ifdef::env-github,rspecator-view[]