[SMW-devel] How to use "userparam" in template calls?

[Jan S. <ja...@sa...>]

Hey,
On help page http://semantic-mediawiki.org/wiki/Help:Template_format 
it's mentioned:
/Parameter "userparam" - Type "text" - default "empty" - description "A 
value passed into each template call, if a template is used "/
Unfortunately there is no example of its usage in the SMW documentation 
(as far as I've seen).

Can a developer check the code and explain to me how to use userparam? 
Noone on the user list seems to know, and while I find the string 
"userparam" in queryprinters SMW_QP_Category.php and SMW_QP_List.php  
(and in languages/SMW_Messages.php) I cannot read the code :-(

I have tried to use it as shown below, but I get results that do not 
include any /userparam/ provided.

I tried creating /Template:Test/ that simply prints /{{{1|empty}}} 
{{{2|empty}}} {{{3|empty}}}/, and then called it like this

    {{#ask:<selection>|format=template|template=test|link=none|userparam=bla}}

The result looks something like

    <pagename1>  empty empty
    <pagename2>  empty empty

while I would expect (or hope) to see

    <pagename1>  bla empty
    <pagename2>  bla empty

or maybe

    bla<pagename1>  empty
    bla<pagename2>  empty

in other words: the string provided in userparam doesn't show up in the 
template.
Thanks,
-- 
Jan "Saruman!" S.
"I'm a stream of noughts and crosses in your R.A.M."