IBM 1800409-001A - Manual (Page 404)

are retained when the system is reset (E or receipt of Printer Job
Language). External objects reside on the additional resources.
All objects are temporary when first created. They can be made
permanent objects through PCL commands. Both temporary or
permanent objects can become external objects when the current
resource is changed (for temporary objects Retain Temporary must
be set to On, True, or On Compatibility). External objects become
permanent when the resource in which they reside becomes the
current resource.
User-downloaded PCL objects (with the exception of palettes) are
identified by an ID when they are downloaded. The ID is usually
set by the file performing the download. If not, the system will
provide a default value (normally 0, but this can be set using the
%%IncludeFeature:install DOC). If two objects of the same type
are provided with the same ID, the last one received replaces the
former. From that point on, downloaded objects are accessible by
their IDs.
Resource
A resource is a location where downloaded objects such as fonts,
macros, and patterns are stored. The printer has one default
resource and one additional resource for each attached hard disk.
All downloaded objects are stored in file systems which reside on
these resources. The RAM1 resource may be used as the default,
but systems with at least one hard disk use the system disk instead.
So, for any hard disk-equipped printer, all downloaded objects
(except palettes, which require special handling) are stored on disk.
The default resource and one of the additional resources can reside
on the same hard disk, but they will be located in different
directories of that resource’s file system.
Appendix D
D - 1 6 A d d i t i o n a l T e c h n i c a l I n f o r m a t i o n