XML Schema selector element
Definition and usage
The selector element specifies the XML path language (XPath) expression, which is an identifier 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>
| Attribute | 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 identification constraint (declared element). |
| any attributes | Optional. Specifies any other attributes with non-schema namespace. |
