Place element at top

Hello all,

We need span="all" to span over two columns.
Unfortunately, FOP can only handle this attribute when it is not nested... So all elements that we want to span, we must place at the highest level (topmost block).

How can we accomplish this ?
We have an FO file with nested elements who must be spanned, so we have to end the open blocks before the spanned element and start the same blocks at the end of the spanned element. 

Current situation:

<fo:block text-align="justify">
<fo:block font-size="10pt">
.. the to be spanned element
</fo:block
</fo:block>


New situation:

<fo:block text-align="justify">
<fo:block font-size="10pt">
</fo:block
</fo:block>
.. the to be spanned element
<fo:block text-align="justify" >
<fo:block font-size="10pt">

Thanks for any suggestion !!!

Greetings,
Dineke van den Bos

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