xs:selector

Specifies an XPath expression that selects a set of elements for an identity constraint. See more info at http://www.w3.org/TR/xmlschema-1/#element-selector.

Table 4.18. xs:selector properties
Property NameDescriptionPossible Values
XPathRelative XPath expression identifying the element on which the constraint applies.An XPath expression.
IDThe component id.Any ID.
ComponentThe edited component name.Not editable property.
System IDThe component system id.Not editable property.