HP NonStop G-Series - Manual (Page 80)

Preparing Your Data Definition Language (DDL) Source
The Tandem DDE Gateway Bridge Program
5–2 110838 Tandem Computers Incorporated
DDE Gateway for a data element name (qualified with all hierarchical levels) is
100 characters. This directive shortens names that exceed this limit without
changing the data element names themselves.
TDMGW-MESSAGE-FLAG
to provide a numeric flag that you want associated with all data elements in a
message structure. You can use this flag in a User Hook Library to implement
application-specific automatic data conversions.
TDMGW-ELEMENT-FLAG
to provide a numeric flag that you want associated with an individual data
element in a message structure. You can use this flag, in addition to the TDMGW-
MESSAGE-FLAG, in a User Hook Library to implement application-specific
automatic data conversions.
Note Enter directives for the Bridge program on the first line of DDL comments for DDL definition. If the first
line of comments contains any Bridge directive, then the Bridge scans the comment lines to pick up all the
Bridge directives specified.
If you specify more than one directive for a DDL definition, separate them with
commas. You can enter directives in uppercase or lowercase letters.
TDMGW-IPC Directive This directive identifies a DDL DEF as being a message definition that should be
processed by the Bridge. Specify this directive only before a DDL DEF that defines a
complete message layout.
Syntax
TDMGW-IPC
Default
The Bridge program will not process the DDL DEF.
TDMGW-C-STRINGS
Directive
This directive identifies a DDL DEF for which the Tandem DDE Gateway automatic
data conversion functions should assume that alphanumeric data element values are
terminated with a byte of binary zeros. Specify this directive only before a DDL DEF
that defines a complete message layout.
Syntax
TDMGW-C-STRINGS
Default
The Tandem DDE Gateway automatic data conversion assumes that alphanumeric
items are padded with trailing spaces, which is the COBOL standard.
TDMGW-DDEALIAS
Directive
This directive provides an abbreviated name for a data element. The size limit in the
Tandem DDE Gateway for a data element name (qualified with all hierarchical levels)
is 100 characters. You can use this directive to shorten names that exceed this limit
without changing the data element names themselves. Use up to 30 alphanumeric and
hyphen characters starting with a letter for the AliasName attribute. Lowercase letters
are upshifted. Specify this directive only before a data item within a DDL DEF.