This description is taken from ECMA-269,
Section 6.1.3.3, "Device Configurations".
6.1.3.3 Device Configurations
A device configuration describes the arrangement of the various
elements and appearances that can be directly
associated with a given device. Multiple device configurations may
be formed from the possible combinations of
physical elements, logical elements, and different appearance types.
Device configurations are described in terms of a specific device configuration
for a particular device:
-
Device�s element combination - This indicates whether the device
has a physical element only, a logical element only or both a logical and
physical element.
-
Other devices using the physical element - This indicates the list
of devices (i.e., their logical elements) that are using the physical element
of the base device.
-
Other devices using the logical element - This indicates the list
of devices (i.e., their physical elements) that are using the logical element
of the base device.
-
The logical element�s appearance addressability - This is an attribute
of the appearances of the logical element of the base device (if the logical
element is present).
-
The logical element�s appearance type - This is an attribute of
the appearances of the logical element of the base device (if the logical
element is present).
-
The number of appearances associated with the logical element -
This is an attribute of the logical element of the base device (if the
logical element is present).
As a set, these attributes describe the device configuration for a specific
device. The following sections illustrate
typical examples of device configurations that can exist in a switching
sub-domain.
Note that in the following examples, where physical and logical elements
form part of the same device, the
application of a suffix number to the identifying letter identifies
that they are parts of the same device (e.g. L1, P1
are a single device; L1, P2 are elements from different devices).