The Document Interchange Architecture Query Reply
This query reply indicates the Document Interchange Architecture (DIA) function set supported. The format of the DIA Query Reply is as follows:
| Offset | Length | Content | Meaning |
|---|---|---|---|
| 0 | 1 word | Length | Length of structure (includes self-defining parameters) |
| 2 | 1 byte | X'81' | Query reply ID |
| 3 | 1 byte | X'97' | IBM DIA |
| 4–5 | 2 bytes | FLAGS | Reserved |
| 6–7 | 2 bytes | LIMIN | Maximum DDM bytes allowed in inbound transmission |
| 8–9 | 2 bytes | LIMOUT | Maximum DDM bytes allowed in outbound transmission |
| 10 | 1 byte | NFS | Number of 3-byte function set IDs that follow |
| 11–13 | 3 bytes | DIAFS | DIA function set identifier |
| 14– (13+(N*3)) | N*3 bytes | DIAFSs | Additional DIA function set IDs |
| 14+(N*3) | 1 byte | X'04' | Parameter length |
| 15+(N*3) | 1 byte | X'01' | Direct access |
| 16+(N*3) | 1 word | DOID | Destination/origin ID assigned by the subsystem |
The DIA auxiliary device processor supports only the direct access self-defining parameter. It is defined in IBM Product-Defined Direct Access Self-Defining Parameter.
The presence of the direct access ID self-defining parameter indicates that the auxiliary device can be accessed directly by using the destination/origin structured field.
| Offset | Length | Content | Meaning |
|---|---|---|---|
| 0 | 1 byte | X'04' | Parameter length |
| 1 | 1 byte | X'01' | Direct access ID |
| 2–3 | 2 bytes | DOID | Destination/origin ID |
- DOID
- The value in these bytes is used in the ID field of the destination/origin structured field to identify the auxiliary device as the destination or origin of the data that follows.
Refer to IBM 3270 Information Display System Data Stream Programmer's Reference for the field definitions for this query reply.