XML Schema selector element
Definition and Usage
The selector element specifies an XML path language (XPath) expression that identifies a constraint to select a set of elements (unique, key, and keyref elements).
Element Information
| Occurrence Times | Once |
| Parent Element | key, keyref, unique |
| Content | annotation |
Syntax
<selector id=ID xpath=a subset of XPath expression any attributes > (annotation?) </selector>
| Attributes | Description |
|---|---|
| id | Optional. Specifies the unique ID of the element. |
| xpath | Required. Specifies the XPath expression relative to the declared element. This expression identifies the child elements that apply the identifier constraint (the declared element). |
| any attributes | Optional. Specifies any other attributes with non-schema namespace. |
