CHAPTER 10
980
Document Interchange
Tables 10.55 and 10.56 describe the contents of the OPI dictionaries for OPI 1.3
and OPI 2.0, respectively, along with the corresponding PostScript OPI com-
ments. The dictionary entries are listed in the order in which the corresponding
OPI comments should appear in a PostScript program. Complete details on the
meanings of these entries and their effects on OPI servers can be found in
OPI:
Open Prepress Interface Specification 1.3
(available from Adobe) and Adobe Tech-
nical Note #5660,
Open Prepress Interface (OPI) Specification, Version 2.0.
TABLE 10.55 Entries in a version 1.3 OPI dictionary
KEY
TYPE
OPI COMMENT
VALUE
Type
name
(Optional)
The type of PDF object that this dic-
tionary describes; if present, must be
OPI
for an
OPI dictionary.
(Required)
The version of OPI to which this dic-
tionary refers; must be the number 1.3 (not the
name
1.3
, as in an OPI version dictionary).
%ALDImageFilename
Version
number
F
file speci-
fication
byte string
text string
(Required)
The external file containing the im-
age corresponding to this proxy. (See implemen-
(Optional)
An identifying string denoting the
image.
(Optional)
A human-readable comment, typical-
ly containing instructions or suggestions to the
operator of the OPI server on how to handle the
image.
(Required)
An array of two integers of the form
[
pixelsWide pixelsHigh
]
ID
%ALDImageID
Comments
%ALDObjectComments
Size
array
%ALDImageDimensions
specifying the dimensions of the image in pixels.
CropRect
rectangle
%ALDImageCropRect
(Required)
An array of four integers of the form
[
left top right bottom
]
specifying the portion of the image to be used.