Virtual printer reserved attribute names

Reserved attribute names are names that are assumed by the print job manager.

Virtual printer reserved attributes

Item Descriptor
First two characters are _ _ Group header attribute.
First character is @ Value is provided automatically.
First character is _ Default value for flag argument.
First character is i Pipeline for input data stream.
First character is l Flags prohibited for input data stream.
First character is f Command string for the filter flag.
First character is z and second character is D, P, or S:
Item Descriptor
zD Default state of the colon file when in the /var/spool/lpd/pio/custom/* directory (+ means expanded, ! means contracted).
zP Name of the colon file's parent colon file. The parent colon file is assumed to be in the /usr/lib/lpd/pio/predef/* directory.
zS Current state of the colon file (+ means expanded, ! means contracted).
Item Descriptor
First character is y Values for terminal-attached printers.