This element can not contain text. It may contain the following children: annotation, aside, block, caption, code, xforms:group, hd, list, m:math, note, object, p, pagebreak, quote, xforms:repeat, sel:select, separator, table and verse.
http://www.daisy.org/z3986/2010/auth/features/select/#
This element belongs to the feature «Content Selection»
| Name | Presence | Description |
|---|---|---|
| expr | Required | Value: Any string |
| xml:id | Optional | Value: Some value of type ID
|