queries allowed with form posts?

[Thomas Lange]

I am building a chat server that uses ESI
to call my code.

But,

"<FORM ACTION=\"/esi/erlchat:logoff?",
User,
"\" METHOD=POST>",

does not work.

mod_esi only handles query strings if action
is "GET", not "POST", which causes the function

erlchat:logoff?User

to be called. 

So is the reason:

1. Lack of functionality in mod_esi?
2. This is not allowed according to standards?
3. I am stupid enough to use query strings this way?

I can use an input variable instead, no big deal, 
but I just want to know the reason.

/Thomas