PUTOVR is a record-level keyword used with OVRATR or OVRDTA to permit the
override of either display attributes or data contents (or both) of specific
fields. By using PUTOVR, you can reduce the amount of data sent to the 5250
display device. In WebFacing, all fields are sent to the Web browser whenever a
page is displayed, and WebFacing does not support the partial update of a Web
page. As a result, there is no performance gain by using PUTOVR in WebFacing.
The keyword is not supported by WebFacing and will be ignored, so your
application may not work the same as 5250. For example, on 5250 the output
operation of a record that has PUTOVR specified will only update the PUTOVR
record (that is, update the fields that have OVRATR or OVRDTA specified). Any
existing records on the display will remain untouched. However, when the same
output operation is executed in WebFacing, any existing records on the display
will be removed if OVERLAY is not specified on the PUTOVR record. To avoid
existing records being removed from the display, you can add the OVERLAY keyword
on the record which has PUTOVR specified.