How to restrict rows in a Group based on some condition in XMLP?

We can use below syntax to restricting the rows in the Group based on condition:
 
Syntax:
<?for-each:Group_Name[./Field_name with Condition]?>

Example:
<?for-each:EMP_DETAILS[EMP_ADDRESS!=”]?>

In this examples it will filter the Records with EMP_ADDRESS is not Null and Displays in the Report.