Glen Mazza wrote:...
(2.) Just as an FYI, as to the issue of whether the FO's themselves have traits--from our previous discussion, you were saying that elements have attributes, FOs have properties and Area Tree elements have traits, I believe. That fact is confirmed in the second paragraph of the Ch. 3 of the spec. However, somewhat confusingly, if you look at the second, third, and fourth diagrams in 1.1.2, Formatting, the spec also refers to traits as the refined/finished properties of the "refined formatting object tree". So in some cases, they do consider traits to be both at the finished FO tree and the area tree.
I don't think I had noticed this before. It looks like the standard *does* consider the refined properties to be traits. Since a refined value in the FO Tree should be the same as the value used in the Area Tree, that makes some sense.
There is not a simple correspondence between properties and traits in all cases. See my table http://xml.apache.org/fop/design/alt.design/traits.html for a summary of traits. I can't recall whether it is complete, but I scoured the Rec for references, and put what I could find in there.
Peter -- Peter B. West <http://www.powerup.com.au/~pbwest/resume.html>