Table entry orientation in customization layer

Hi everybody,

I would like to customize my fo layer on table <entry> in order to use the rotate=1 attribute value. I would like the following:

When:
<entry rotate="1">text</entry>

Have the same behaviour as:
<entry align="right"><?dbfo orientation="90"?>text</entry>

But I don't know how to mimic the add of a Processing Instruction.

By the way I don't know if it is the best solution. I just want to not add a Processing Instruction in each of my entries I want rotated.

Could anyone give me a hint?

Thx,
Regards,