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XML Schema selector Element

Definition and Usage

The selector element specifies an XML Path Language (XPath) expression that selects a set of elements (unique, key, and keyref elements) for identification constraints.

Element Information

Syntax

(? symbol indicates that the element can appear zero or one time within the restriction element.)

Attribute Description
id Optional. Specifies a unique ID for the element.
xpath Required. Specifies an XPath expression relative to the declared element. This expression identifies the child elements to which the identification constraint (declared element) applies.
any attributes Optional. Specifies any other attributes with non-schema namespaces.
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