XML Schema selector element
Complete XML Schema Reference Definition and Usage
selector element specifies the XML Path Language (XPath) expression that identifies constraints to select a set of elements (unique, key elements and keyref).
Element Information
- Parent element: key, keyref, unique
grammar
<selector
id=ID
xpath=a subset of XPath expression
any attributes
>
(annotation?)
</selector>
id=ID
xpath=a subset of XPath expression
any attributes
>
(annotation?)
</selector>
(? Sign declares that the restriction element of the element can occur zero or one time.)
| 属性 | 描述 |
|---|---|
| id | 可选。规定该元素的唯一的 ID。 |
| xpath | 必需。规定相对于所声明的元素的 XPath 表达式。该表达式标识应用标识约束（所声明的元素）的子元素。 |
| any attributes | 可选。规定带有 non-schema 命名空间的任何其他属性。 |
Complete XML Schema Reference