marc_subfield_structure
| 欄位 | 型態 | 範例 |
| tagfield | char(3) | |
| tagsubfield | char(1) | |
| liblibrarian | varchar(255) | |
| libopac | varchar(255) | |
| repeatable | tinyint(4) | |
| mandatory | tinyint(4) | |
| kohafield | varchar(40) | |
| tab | tinyint(1) | |
| authorised_value | varchar(10) | |
| authtypecode | varchar(10) | |
| value_builder | varchar(80) | |
| isurl | tinyint(1) | |
| hidden | tinyint(1) | |
| frameworkcode | varchar(10) | |
| seealso | varchar(255) | |
| link | varchar(80) |
