Nortel Networks VT100 manual Row,column field-name field I/O, Field-descriptor syntax

2-20Template files

Figure 2-13

The field-descriptor syntax

row,column field-name field I/O

Note: If the application running on the host is stream-based, meaning the screen scrolls as the user enters data and retrieves responses, you should enter the field-descriptor as follows:

0,0- BLANKOUT

In this instance, the field-descriptor will clear the TRS memory space associated with the application screen so that your application call flow will know where to retrieve the appropriate data.

row,column If the TRS is going to read information from a field on the host screen, this entry locates the field on the screen. If you know the exact location of the field the TRS is reading from, you can enter it in row, column format. If you do not know the exact location of the field the TRS is reading from, or if the location of the field varies, you can enter 0,0 and the TRS will search for a match to the name specified in field name. For unformatted, character-based applications, you must specify the exact location.

In VT100 transactions, writing to the terminal screen always occurs at the current cursor position. Therefore, if the field I/O action is writing text to the host screen, the TRS will write the text to the screen at the current cursor position regardless of the row,column you specify.

555-9001-316 Standard 1.0 February 1996