Document driven switching TOC on/off

Hello Everyone,

is there any simple way how to switch generating of TOC on/off directly in
the given document? 

I know I can influence this using the generate.toc parameter in the XSLT
stylesheet, but this must be properly set when transformation is performed.
I'd like to avoid this dependency.

I can imagine a custom processing instruction, that will be handled in the
customization layer (it will set the correct content of the generate.toc
parameter), but if there are already some means in the current stylesheets,
I'd prefer built-in solution.

Regards,

Jan