Xerox CX PRINT SERVER 550 User Manual page 158

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L*a*b*
long-edge first (LEF)
lookup table (LUT)
PDF/X
PPD (PostScript Printer Description)
pre-separated file
A device-independent color measurement system that measures
Lightness (or Luminance) and two color coordinates, A (red/green)
and B (blue/yellow). It may be used as an intermediate color space
used when converting from one color space to another (for
example, from CMYK to RGB).
A printer page orientation where pages are delivered to the printer
with the long edge of the paper going in first.
A two or three-dimensional array of values that stores information
about specified input-output relationships. When an input value is
known, the system can automatically determine the correct output
value. For example, the system can find the required dot size for a
given set of printing conditions based on the stored gray level.
Color setups can be saved in color tables (color transformation
tables), which is one of the many kinds of LUTs.
Abbreviation for Portable Document Format eXchange. An
exchange format for sending pages between a page preparation
site and a printing site. PDF/X is a subset of the full PDF
specification.
A file specification set by Adobe Systems, Inc. It contains output-
device-specific information, including fonts, line screens, offset
margins, supported page sizes, and so on.
A PDF, PostScript, or TIFF file that contains a separate page for
each color in a document. A standard process color job would
have four pages—one for each process color. A job with spot
colors would have a page for each spot color and a page for each
process color.
Chapter 15—Glossary