CHAPTER 10
968
Document Interchange
The visual presentation of a printer’s mark is defined by a form XObject specified
as an appearance stream in the
N
(normal) entry of the printer’s mark annota-
tion’s appearance dictionary (see Section 8.4.4, “Appearance Streams”). More
than one appearance may be defined for the same printer’s mark to meet the
requirements of different regions or production facilities. In this case, the
appearance dictionary’s
N
entry holds a subdictionary containing the alternate
appearances, each identified by an arbitrary key. The
AS
(appearance state) entry
in the annotation dictionary designates one of them to be displayed or printed.
Note:
The printer’s mark annotation’s appearance dictionary may include
R
(roll-
over) or
D
(down) entries, but appearances defined in either of these entries are
never displayed or printed.
Like all annotations, a printer’s mark annotation is defined by an annotation dic-
tionary (see Section 8.4.1, “Annotation Dictionaries”); its annotation type is
PrinterMark
. The
AP
(appearances) and
F
(flags) entries (which ordinarily are
optional) must be present, as must the
AS
(appearance state) entry if the appear-
ance dictionary
AP
contains more than one appearance stream. The Print and
ReadOnly flags in the
F
entry must be set and all others clear (see Section 8.4.2,
specific to this type of annotation.
TABLE 10.48 Additional entries specific to a printer’s mark annotation
KEY
TYPE
VALUE
Subtype
name
name
(Required)
The type of annotation that this dictionary describes; must be
PrinterMark
for a printer’s mark annotation.
(Optional)
An arbitrary name identifying the type of printer’s mark, such as
ColorBar
or
RegistrationTarget
.
MN
The form dictionary defining a printer’s mark can contain the optional entries
shown in Table 10.49 in addition to the standard ones common to all form dictio-
naries (see Section 4.9.1, “Form Dictionaries”).
TABLE 10.49 Additional entries specific to a printer’s mark form dictionary
KEY
TYPE
VALUE
MarkStyle
text string
(Optional; PDF 1.4)
A text string representing the printer’s mark in human-
readable form and suitable for presentation to the user on the screen.