SECTION 4.10
383
Optional Content
The entries in the usage dictionary are used as follows:
•
View
: The recommended state is the value of the
ViewState
entry. This entry al-
lows a document to contain content that is relevant only when the document is
viewed interactively, such as instructions for how to interact with the docu-
ment.
•
Print
: The recommended state is the value of the
PrintState
entry. If
PrintState
is not present, the state of the optional content group is left unchanged.
•
Export
: The recommended state is the value of the
ExportState
entry.
•
Zoom
: If the current magnification level of the document is greater than or
equal to
min
and less than
max
, an
ON
state is recommended; otherwise,
OFF
is
recommended.
•
User
: The
Name
entry specifies a name or names to match with the user’s iden-
tification. The
Type
entry determines how the
Name
entry is interpreted
(name, title, or organization). If there is an exact match, an
ON
state is recom-
mended; otherwise
OFF
is recommended.
•
Language
: This category allows the selection of content based on the language
and locale of the application. If an exact match to the language and locale is
found among the
Lang
entries of the optional content groups in the usage ap-
plication dictionary’s
OCGs
list, all groups that have exact matches receive an
ON
recommendation. If no exact match is found, but a partial match is found
(that is, the language matches but not the locale), all partially matching groups
that have
Preferred
entries with a value of
ON
receive an
ON
recommendation.
All other groups receive an
OFF
recommendation.
naries. The
AS
entry in the default configuration dictionary is an array of three
usage application dictionaries, one for each of the
Event
values
View
,
Print
, and
Export
.
Note:
While this case is typical, there is no restriction on multiple entries with the
same value of
Event
, which allows documents with incompatible usage application
dictionaries to be combined into larger documents and have their behavior pre-
served. If a given optional content group appears in more than one
OCGs
array, its
state is
ON
only if all categories in all the usage application dictionaries it appears in
recommend a state of
ON
.