Indicates the type of or reason for a supplement, for example:
|
issue |
for supplements to a particular journal issue |
|
conference |
for supplements containing information from a conference, symposium, or other gathering |
|
periodic |
for supplements issued at regular intervals |
| Value | Meaning |
|---|---|
| Text, numbers, or special characters | The type or reason for the supplement, for example, “conference” |
| Restriction: This attribute may be specified if the element is used. | |