Points to the identifier of the associated element as a means of linkage, for example, from a <term> to a <def>, or from a <bio> to an <contrib>
| Value | Meaning |
|---|---|
| One or more identifiers (IDREFS) | Points to one or more existing identifiers |
| Restriction: This attribute may be specified if the element is used. | |
| Value | Meaning |
|---|---|
| One or more identifiers (IDREFS) | Points to one or more existing identifiers |
| Restriction: This attribute must be specified if the element is used. | |