Host Connection Program Guide and Reference
3-12
3270 Data Stream Outbound Structured Fields
The structured field is a format used to transport data. Outbound structured fields are data
fields that are sent from the host to the local system running HCON.
The HCON write structured field (WSF) command (X‘F3’) transmits the outbound
structured fields to the display session. You can issue a single write structured field
command to send one or more structured fields.
WSF Command
(X‘F3’)
Structured
Field 1
Structured
Field 2
... Structured
Field n
The outbound structured field functions supported by an HCON display session include:
Function
ID Code (Hex)
Byte 2 Byte 4
Read Partition:
Query
Query List
01
02
03
Erase/Reset 03
Set Reply Mode 09
Outbound 3270DS:
Write
Erase/Write
Erase/Write Alternate
Erase ALL Unprotected
40
F1
F5
7E
6F
The outbound structured field functions perform the following operations:
Read Partition Enables a host application program to ascertain the color, highlighting,
usable area, reply modes, symbol-set, and other characteristics of a
terminal. The format of the read partition structured field is:
Byte
Content Description
0–1 L Length of this Structure
2 X‘01’ Read Partition
3 X‘FF’ Partition ID (PID)
4 TYPE
X‘02’
X‘03’
Query
Query
Query List
5 Bits 0–1
B‘00’
B‘01’
B‘10’
B‘11’
Bits 2–7
B‘000000’
This byte is present only for:
Query List (X‘03’)
Q-code List (Bytes 6-N)
Query Equivalent plus Q-code List
All Query Replies
(Reserved)
(Reserved)
6–n Q-List List of Query Reply Codes
(Present only for Query List)
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