An IDREF-type attribute that points to the Identifier attribute of the <glyph-data> character inside a <private-char> element. The idea is to use the full <glyph-data> element with its name and bitmap once, then point to an existing character instead of repeating the entire <glyph-data> element over and over again.
Once a private character has been declared using a <glyph-data> element, the character can be reused by using this element to point to the existing full (bitmap included) <glyph-data> element.
| Value | Meaning |
|---|---|
| An identifier (IDREF) | The pointing uses the ID/IDREF mechanism, using the glyph-data attribute of this element to point to the id attribute of an existing <glyph-data> element. |
| Restriction: This attribute may be specified if the element is used. | |