An IDREF-type attribute that points to the @id attribute of a list which the current list continues; used to connect discontiguous lists that constitute one logical list.
| Value | Meaning |
|---|---|
| A pointer (IDREF) | Points to the existing identifier (@id) of a list element, to mark the current list as continued from the targeted (pointed to) list, which may be a list (<list>) or a definition list (<def-list>). |