To invalidate the local copies of a cached data item, specify the data item name on the NAME keyword and omit the NAMEMASK keyword. The system selects only the data item specified on NAME.

Optionally, you can code both NAME and NAMEMASK to provide a character selection pattern. The NAMEMASK keyword defines a selection bit-mask. The selection bit-mask together with the name specified on the NAME keyword defines a character selection pattern that the system uses to select data item names. The technique enables you to select multiple data item names.