Questions about Inline Formatting Object

First question: if I am write:
.
.
.
<fo:block> This is a page number  <fo:page-number border = "thin solid
black"/></fo:block>+-
.
.
.
I think that the flow as written above will generate output like this:

         This is a page number | number |

where "|" are the start-border and the end-border and it's not possible to
see the after-border and the before-border. This is determined by the
following default values:

- line-stacking-strategy  = line-height
- line-height = normal  (1.0)

for both fo:block and fo:page-number.
Is this true?
Is this true for any inline fo: that have borders?
It's possible to see the after-border and the before-border to set the
line-height properties of
fo:block to a sufficient value?

Second question:
if I'm write

<fo:inline-rule line-height = "1.5"/>
<fo:inline-graphic line-height = "1.5"/>

the computed value of line-height is 1.5 multiplied by the element font size
but inline-rule and inline-graphic haven't font-size properties.

Regards,

Massimiliano Tambini





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