relative-position property and fo:table*

The relative-position property is permitted on:

fo:table-and-caption
fo:table
fo:table-caption
fo:table-header
fo:table-footer
fo:table-body
fo:table-row
fo:table-cell

However, the position properties (right, left, top, bottom) are not listed as
applicable to the above FOs under the definition of these FOs. If the value of
relative-position is "relative", then these position properties would be
required to specify the relative offset.

Now, to come to a more interesting problem, how would the use of relative-offset
with a value of "relative" on the following FOs impact the border collapse
behavior:

fo:table-header
fo:table-footer
fo:table-body
fo:table-row
fo:table-cell

Would the use of relative positioning on any of these FOs disqualify it for
participation in border collapsing?

Regards,
Glenn