983
SECTION 10.10 Prepress Support
TABLE 10.56 Entries in a version 2.0 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.
Version number (Required) The version of OPI to which this dic-
tionary refers; must be the number 2 or 2.0 (not
the name 2.0, as in an OPI version dictionary).
F file speci- %%ImageFilename (Required) The external file containing the low-
fication resolution proxy image. (See implementation
note 175 in Appendix H.)
MainImage byte string %%MainImage (Optional) The pathname of the file containing
the full-resolution image corresponding to this
proxy, or any other identifying string that
uniquely identifies the full-resolution image.
Tags array %%TIFFASCIITag (Optional) An array of pairs of the form
[ tagNum1 tagText1 … tagNumn tagTextn ]
where each tagNum is an integer representing a
TIFF tag number and each tagText is an ASCII
string or an array of ASCII strings representing
the corresponding ASCII tag value.
Size array %%ImageDimensions (Optional; see note below) An array of two num-
bers of the form
[ width height ]
specifying the dimensions of the image in pixels.