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The section of the CIP4 manual is below. My interpretation is that "Xyz" is the normal printing sequence and "XyZ" therefore is therefore a reverse printing sequence of a logical stack. The confusion comes from perspective and the statement "Specifies flowing top of stack to bottom of it through the stack". If you view the statement as a physical stack from a printers perspective, then to achieve "z", the stack requires reversing to achieve the desired order, however, if you view it from the perspective of a logical stack being processed, "z" would not require processing to achieve the order. Ive come across difference implementations in devices and would appreciate clarification. Thx


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      According to both the wording and the examples, capital  Z would result in lower page numbers on the bottom of the stack and lower-case z would result in lower page numbers on the top of the stack.


      Thus if x=y=1 Z is the same as SameOrderFaceDown and z is the same as ReverseOrderFaceUp

      I hope this helps.

      1. martin goodall

        I (had) interpreted the stack as the logical stack and not physical stack, hence why I see the document as ambiguous. However I am ok with your answer as the interpretation since you clarified it officially (smile)

        Your answer leaves a small piece of confusion...did you mean:-

        "Z is face down and z is face up." or did you mean

        "Z is same order and z is reverse order", or did you mean

        "Z is the same as SameOrderFaceDown and z is the same as ReverseOrderFaceUp" ?

        thx

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