[Zope] acquisition from parent within standard_html_header

[Service Informatique CHSR]

Hello,

I want to *add* content to the default standard_html_header in a subfolder
that we call, say, SF. The standard_html_header in SF reads:

<!--#var standard_html_header-->
<!-- other content-->

But since an object acquire from itself, this did not work (infinite
traceback,
obviously because the stack is filled with recursive calls)
So I wrote:

<!--#with aq_parent--><!--#var standard_html_header--><!--#/with>
<!-- other content-->

And it works for object accessed within SF. But when I create sub-folder
*under*
SF, say SSF, I end up with an error.

How could i write this?

Regards, Jephte CLAIN
Service Informatique CHSR