Table 367 – Additional entries specific to a trap network appearance stream

Key

Type

Value

PCM

name

(Required) The name of the process colour model that was assumed when this trap network was created; equivalent to the PostScript page device parameter ProcessColorModel (see Section 6.2.5 of the PostScript Language Reference, Third Edition). Valid values are DeviceGray, DeviceRGB, DeviceCMYK, DeviceCMY, DeviceRGBK, and DeviceN.

SeparationColorNames

array

(Optional) An array of names identifying the colorants that were assumed when this network was created; equivalent to the PostScript page device parameter of the same name (see Section 6.2.5 of the PostScript Language Reference, Third Edition). Colourants implied by the process colour model PCM are available automatically and need not be explicitly declared. If this entry is absent, the colorants implied by PCM shall be assumed.

TrapRegions

array

(Optional) An array of indirect references to TrapRegion objects defining the page’s trapping zones and the associated trapping parameters, as described in Adobe Technical Note 5620, Portable Job Ticket Format. These references refer to objects comprising portions of a PJTF job ticket that shall be embedded in the PDF file. When the trapping zones and parameters are defined by an external job ticket (or by some other means, such as JDF), this entry shall be absent.

TrapStyles

text string

(Optional) A human-readable text string that applications may use to describe this trap network to the user.

EXAMPLE To allow switching between trap networks).