Points to an internal link target by identifying the value of its @xml:id.
Available internal cross-referencing mechanisms, which use this attribute, are described more fully in the descriptions of the related elements, Cross-Reference, Citation Reference and Link.
| Value | Meaning |
|---|---|
| An identifier (IDREF) | The pointing uses the ID/IDREF mechanism, using the @linkend attribute of the associated element (for example, <xref>) to point to the @xml:id attribute of an existing element (for example, <section>). |
| Restriction: This attribute may be specified if the element is used. | |