In order for the parameters in this section to make sense, it is useful to consider .
First, let's consider the regions on the page.
The white region is the physical page. Its dimensions are determined by
the page.height
and page.width
parameters.
The yellow region is the region-body. The size and placement of the region body is constrained by the dimensions labelled in the figure.
The pink region at the top of the page is the region-before. The
darker area inside the region-before is the header text. In XSL, the default
display alignment for a region is before
, but the
DocBook stylesheets still explicitly make it before
. That's
why the darker area is at the top.
The pink region at the bottom of the page is the region-after.
The darker area is the footer text. In XSL, the default display
alignment for a region is before
,
but the DocBook stylesheets explicitly make it
after
. That's why the darker area is at the bottom.
The dimensions in the figure are:
The page-master margin-top.
The region-before extent.
The region-body margin-top.
The region-after extent.
The page-master margin-bottom.
The region-body margin-bottom.
The sum of the page-master margin-left and the region-body margin-left. In DocBook, the region-body margin-left is zero by default, so this is simply the page-master region-left.
The sum of the page-master margin-right and the region-body margin-right. In DocBook, the region-body margin-right is zero by default, so this is simply the page-master region-left.