SECTION 9.1
779
Multimedia
TABLE 9.26 Entries in a media player info dictionary
KEY
TYPE
VALUE
Type
name
dictionary
(Optional)
The type of PDF object that this dictionary describes; if present, must be
MediaPlayerInfo
for a media player info dictionary.
(Required)
A software identifier object (see “Software Identifier Dictionary,” below)
that specifies the player name, versions, and operating systems to which this media
player info object applies.
(Optional)
A dictionary containing entries that must be honored for this object to
be considered viable
Note:
Currently, there are no defined entries for this dictionary
PID
MH
dictionary
BE
dictionary
(Optional)
A dictionary containing entries that need only be honored in a “best ef-
fort” sense.
Note:
Currently, there are no defined entries for this dictionary
Software Identifier Dictionary
A
software identifier dictionary
allows software to be identified by name, range of
versions, and operating systems; its entries are listed in Table 9.27. A viewer ap-
plication uses this information to determine whether a given media player can be
used in a given situation. If the dictionary contains keys that are unrecognized by
the viewer application, it is considered to be partially recognized. The viewer ap-
plication may or may not decide to treat the software identifier as viable, depend-
ing on the context in which it is used.
The following procedure is used to determine whether a piece of software is con-
sidered to match a software identifier object:
Algorithm 9.2
1.
2.
3.
The software name must match the name specified by the
U
entry (see “Software
The software version must be within the interval specified by the
L
,
H
,
LI
, and
H1
entries (see “Version arrays,” below).
The machine’s operating system name must be an exact match for one present in
the
OS
array. If the array is not present or empty, a match is also considered to ex-
ist.