This page applies to Harlequin v13.1r0 and later; both Harlequin Core and Harlequin MultiRIP.
DCS stands for desktop color separation; it is Quark Inc’s method of image substitution in PostScript language jobs.
Two versions of DCS are described in [DCS1] and [DCS2]:
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DCS1 is always a multiple file format. One file, the DCS main, typically contains low-resolution image data and is placed on a page in a page make-up program. Typically, four other files hold high-resolution, color-separated data for CMYK—to be used for final printing. There may be fewer than four files (for example, in monochrome work).
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DCS2 includes the same model but allows for all of the data to be enclosed in a single file if desired. It also supports the use of spot colors as well as process colors.