CHAPTER 10
918
Document Interchange
KEY
TYPE
VALUE
Before
Placed so that the before edge of the element’s allocation
rectangle (see “Content and Allocation Rectangles” on page
area. The element may float, if necessary, to achieve the
specified placement (see note below). The element is treated
as a block occupying the full extent of the enclosing reference
area in the inline direction. Other content is stacked so as to
begin at the after edge of the element’s allocation rectangle.
Placed so that the start edge of the element’s allocation
rectangle (see “Content and Allocation Rectangles” on page
area. The element may float, if necessary, to achieve the
specified placement (see note below). Other content that
would intrude into the element’s allocation rectangle is laid
out as a runaround.
Placed so that the end edge of the element’s allocation
rectangle (see “Content and Allocation Rectangles” on page
area. The element may float, if necessary, to achieve the
specified placement (see note below). Other content that
would intrude into the element’s allocation rectangle is laid
out as a runaround.
Start
End
When applied to an ILSE, any value except
Inline
causes the element to be
treated as a BLSE instead. Default value:
Inline
.
Note:
Elements with
Placement
values of
Before
,
Start
, or
End
are removed from
the normal stacking or packing process and allowed to float to the specified edge
of the enclosing reference area or parent BLSE. Multiple such floating elements
may be positioned adjacent to one another against the specified edge of the ref-
erence area or placed serially against the edge, in the order encountered. Com-
plex cases such as floating elements that interfere with each other or do not fit
on the same page may be handled differently by different layout applications.
Tagged PDF merely identifies the elements as floating and indicates their de-
sired placement.