TRANSFER Programming Manual

Packages
TRANSFER Objects
3–4 40970 Tandem Computers Incorporated
Packages For the TRANSFER delivery system to deliver items from one correspondent to
another, the items must be assembled as packages, as shown in Figure 3-3. Packages
are identified by the setting of the package header flag in an item.
Figure 3-3. A Package
Item ID Item ID
Recipient List
Component List
Item Item Item
Package Header
Subject Text Record
Note Record
Recipient
Recipient
Recipient
•
•
•
Item ID
006
Each package includes:
A package header item
One or more records, component items, or external objects (optional)
A list of recipients
The package header item is a special type of item that is like the label on an actual mail
package: it indicates who is sending the package and to whom, when the package was
sent, and what its delivery priority is. The package header might also indicate the
timeframe in which the package should either be delivered or expire. It might also
include a list of component items and external objects associated with the package. If
an item in a package contains other items, those second-level items are not listed in the
package header.
An application builds a package by creating the package header item and making
separate requests to add recipients, component items, and delivery parameters. The
package itself might be composed of different kinds of items in any arrangement. For
example, a package can contain a formatted ASCII item and a digital facsimile data