 |
| |||
| 著录信息块 | |||
| |||
| 可变字段; 变长字段 | |||
| 可变磁场 | |||
| 可变场 | |||
| 变化场 | |||
| 变量场 | |||
| 可变信息组; 可变域 | |||
|
variable fields : 33 phrases in 11 subjects |
| Chemistry | 1 |
| Data processing | 4 |
| Electricity | 1 |
| Electronics | 8 |
| Information technology | 6 |
| Librarianship | 2 |
| Multimedia | 1 |
| Oil / petroleum | 1 |
| Space | 3 |
| Technology | 4 |
| Telecommunications | 2 |