is it legal when using <Layout> to have Side="Back" followed by Side="Front" for a sheet, rather than the more normal front/back?
There is no explicit restriction in the specification, therefore it is legal.
I am not sure how most Layout processors would react to such a construct. Most would probably not even notice.
Since nothing is stated about the ordering, it has no semantic meaning and certainly would not be interpreted as face down.
Note also the "Front" and "Back" are fairly fuzzy concepts, once you go into multi-page impostion, where both front and back pages of the final product can be distributed over both the the front and back of the sheet with no intuitive mapping unless you grab a piece of paper and do the folds...
I struggle with an ambiguous spec, it needs to be clear. My JDF interpretation is as follows:-
<Layout Side="front" >
<content .... />
will generate 1 side of output from a single side of input.
<Layout Side="Back" >
will generate 2 sides of output from a single side of input, ie. blank side is inserted for front, followed by back
<Layout Side="back" >
will generate 2 sides of output from 2 sides of input in the order 1, 2
will generate 2 sides of output from 2 sides of input in the order of 2,1
I believe the multipage imposition is achieved with multiple <content> per side, not more than two <Layout side="nnn">.
three or more sides is illegal.
in other words, Front and Back do have meaning.
if "front" and "back" do not have meaning, then they should have been called "side1", "side2" or "any name" but definitely calling them "front" and "back" imply meaning. I believe the spec must be clarified if there is any chance of consistency in HDF engines.
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