OSI/AS Programming Manual

Parameter Structures
DDL Definitions
056783 Tandem Computers Incorporated A–9
ZAPS-VAL-DATA-TYPE-PDV-SAT-AD signifies that this PDV type is set to single
ASN.1 type and that the contents of this element are located at the address
specified in the ZADDR field. This value is for use only by typed data and data
request primitives; it is only used for sending presentation data.
ZAPS-VAL-DATA-TYPE-PDV-OCT-AD signifies that this PDV type is set to octet-
aligned and that the contents of this element are located at the address specified in
the ZADDR field. This value is for use only by typed data and data request
primitives; it is only used for sending presentation data.
ZPCID, which applies only to presentation and ACSE connections, is the presentation
context identifier (PCID) of one of the presentation contexts available on the
connection. The PCID in this field, which is agreed upon during presentation or ACSE
connection establishment, identifies a presentation context to be used for data transfer.
If no presentation context definition list is defined, then the ZPCID field is ignored and
the presentation default context name is used. For ACSE connections, this field is
ignored in outgoing user data, and it is set to the PCID for ACSE in incoming user
data. For more information on the presentation context identifier, see ZAPS-DDL-
PRES-CNTXT-LIST and ZAPS-DDL-PRES-CNTXT-RLIST later in this appendix.
ZADDR, when applicable, contains a pointer to the data associated with this
data-element header. The ZADDR field applies only to the ZTYPE values ZAPS-VAL-
DATA-TYPE-VALUE-AD, ZAPS-VAL-DATA-TYPE-PDV-SAT-AD, and ZAPS-VAL-
DATA-TYPE-PDV-OCT-AD. For all other ZTYPE values, the ZADDR field is ignored.
ZAPS-DDL-DATA-HDR is the header of the user-data parameter. For further
information on the use of this structure, see ZAPS-DDL-DATA-ELEMENT-HDR in
this subsection and “Sending and Retrieving User Data” in Section 2.
DEFINITION ZAPS-DDL-DATA-HDR.
02 ZNUM-ELEMENTS TYPE ZAPS-DDL-INT1.
02 FILLER PIC X(14).
END
The value of ZNUM-ELEMENTS specifies the number of data elements in the
user-data parameter.
ZAPS-DDL-DIAG-BUF is a diagnostic buffer used to analyze internal errors in the
OSI/AS software. Its contents are Tandem internal.
DEFINITION ZAPS-DDL-DIAG-BUF.
02 ZC PIC X(64).
02 ZS REDEFINES ZC.
03 ZI TYPE BINARY 16 OCCURS 32 TIMES.
02 ZB REDEFINES ZC PIC X OCCURS 64 TIMES.
END