[xep-support] Implication of reference-orientation on simple-page-master

[W. Eliot Kimber]

I put together a little test file to try to better understand how 
reference-orientation on a page master interacts with 
reference-orientation on contained blocks. When I format this doc with 
XSL Formatter I get a different result than I do with XEP.

With XEP, reference-orientation on simple-page-master rotates the before 
edge of the page relative to the viewer's absolute top orientation. That 
is, an orientation of 90 results in a "landscape" page where the before 
edge of the page is on the absolute left and the contained text on the 
page is normally oriented WRT to the before edge (that is a normal 
8.5x11 inch portrait page is just rotated 90 degrees counterclockwise 
when viewed with Acrobat). By contrast, XSL Formatter leaves the page 
orientation unchanged (before edge is still at absolute top) but rotates 
the page content 90 degrees. By same token if the page orientation is 90 
and the flow contains block with an orientation of -90, then I get the 
expected "landscape" page where the text is horizontal relative to 
absolute top (as if the page dimensions were 11x8.5).

Interestingly, if I put the reference-orientation="-90" on the flow and 
not on the contained block, then the text of the block is *not* rotated 
back into horizontal (that is, the -90 rotation isn't applied to the 
block in the flow). However, the XEP validator does not complain about 
the doc.

My reading of the FO spec suggests that the XEP implementation is the 
correct one but my understanding is still dim enough that I'm not sure.

Can y'all shed some light?

Thanks,

E.
-- 
W. Eliot Kimber, eliot at isogen.com
Consultant, ISOGEN International

1016 La Posada Dr., Suite 240
Austin, TX  78752 Phone: 512.656.4139

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