Ditto and page specific snippet

[+id+] is a placeholder that is made available in a Ditto template which will output the document being parsed’s ID.

So, if i well understood:

In each document, i need to call my snippet if [*id*] parameter or without because it is the current document id.
To see this call, from the ditto page, i need to add it in the ditto template with [+id+].

It is not really cool this point. I’m lucky that this call is in the botom of each document...
I think that this point is some strange...
Why ditto does’nt proceded the document snippet in page context ?