Hi, editors, 1. All mentions of "reference-orientation" inheritance in the spec say something like "yes (see prose)". This includes Property Table Parts I and II in the Property Summary, and Section 7.20.3.
The latter (the property description) indicates that the reference-orientation _trait_ on an area is _indirectly_ derived from the corresponding property on the FO that generated that area. Presumably this alludes to Section 5.5.2, which states that "The reference-orientation trait is copied from the reference-orientation property during refinement. During composition an absolute orientation is determined (see Section 4.2.2 - Common Traits on page 14)." and in Section 4.2.2 it says "If the reference-orientation for an area is 0, then the top, bottom, left, and right edges of the content are parallel to those of the area's parent and consistent with them. Otherwise the edges are rotated from those of the area's parent as described in Section 7.20.3 - 'reference-orientation' on page 283." I want to clarify that this process of determining an absolute orientation for the _area_ is not confused with being a "computed value" for the purposes of inheritance. Because a computed value for inheritance is the computed value of an FO property, not the value of a trait. 2. I would like to clarify the inheritance and trait derivation process, particularly for the simple-page-master/region level. Example 1: let's assume that a simple-page-master has a reference-orientation of -90. This means that the TOP of the page-reference-area is at 3 o'clock. The margin-top for the region-body is at 3 o'clock, the margin-left is at 12 o'clock, the margin-right is at 6 o'clock, and the margin-bottom is at 9 o'clock. If the region-body has no explicit specification of reference-orientation then the spec tells me that the reference-orientation is -90 as inherited from the simple-page-master. As a result, the region-reference-area is now oriented with _its_ TOP at -180 (or 180, or 6 o'clock). Is this correct? My reading of the spec tells me that the _indirect_ derivation alluded to above is merely the process of determining for the latter case that TOP for the region-body is at 180, that is, the absolute orientation is 180. I am confused, perhaps needlessly so, by the addition of the "see prose" in reference to inheritance of this property. Why is it there? There is no complication about inheritance of this property; the computed value of the _property_ is the same as the _specified_ value; what the _trait_ on the _area_ is determined to be is something else entirely. Example 2: let's assume that a top-level block-container specifies 90 for the value of "reference-orientation", and that the region-body TOP that applies is also 90. What is the computed value for the reference-orientation _property_ on the block-container? Is it 90 or 180? I interpret the spec as saying that it is 90, and that if there was a nested block-container or inline-container with no explicit specification it would inherit 90. The _absolute orientation_ of the top-level block-container is 180, but this is a trait. Or is the "see prose" a suggestion that in fact the computed value on the top-level block-container is 180? And that this is what potential descendant block-containers or inline-containers would inherit? I hope not. I actually don't think you mean this, but that "see prose" has thrown me for a loop. :-) Clarification welcome. 3. Why the different language when talking about reference-orientation for region-before, region-after, region-start and region-end? I mean this: "The reference-orientation of the region-viewport-area is taken from the value of the reference-orientation trait on the region-master which specifies the region. reference-orientation of the region-reference-area is set to "0" and is, therefore, the same as the orientation established by the region-viewport-area." This language is not used elsewhere. Section 6.4.13 says: "The reference-orientation trait of the fo:region-body is used to orient the coordinate system of the region-reference-area generated by the fo:region-body relative to the coordinate system of the page-reference-area generated by fo:simple-page-master (and, therefore, relative to the viewport positioned in that latter coordinate system)." and Sections 6.5.3 and 6.6.8 say nothing special at all. Is this significant? Just curious. Regards, Arved Sandstrom --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED]
