Table 3.1. Used symbols
| Symbol | Description |
|---|---|
 | Add element. |
 | Column with primitive database type. |
 | Column with compound (typedef) type. Will be ignored during script generation. |
 | Removed element. |
 | Foreign key column. |
 | Index or index group symbol. |
 | Table symbol. |
 | Compound type (typedef) symbol. |
 | Modified element. |
 | Marks a table or a structure where something was change within its content. |