
Chapter 2 Building an XML model
2Click Apply.
3Click the Properties tool beside the XPath box. The selector property sheet appears.
4Define the selector properties in the different pages of the property sheet.
5Click OK.
Defining an identity constraint field
The Fields page of an identity constraint lets you type one or more XPath expressions to specify the values used to define an identity constraint (unique, key or keyRef).
For information on XPath expressions, see section Defining an identity constraint selector.
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