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Chapter 3 Working with an XML model
XSM User's Guide 161
Undefined selector
You must define an XPath expression for a keyRef selector attribute.
Manual correction Automatic correction
In the keyRef property sheet, define an
XPath expression for the selector
attribute. For example:
s:company/s:employee
—
For more information on XPath expressions, see section Defining an
identity constraint selector in chapter Building an XML model.
Unique check
During a unique constraint check, the following object controls are made.
Unique name and code uniqueness
An element cannot contain two unique constraints with identical names
and/or codes.
Manual correction Automatic correction
Rename one of the unique constraints Renames the unique constraint by
appending a number to its name or
code
Existence of fields
A unique constraint must contain at least one field.
Manual correction Automatic correction
Add at least one field to the unique
constraint or delete the unique constraint.
For example: @numEmployee
Deletes unassigned unique constraint
For more information on fields, see section Defining an identity
constraint field in chapter Building an XML model.