Question about WEBAPI URL commands

Question

Hi,
In Visual Composer I'm making a drilldown from table 1 (output from  BW query 1) to table 2 (output BW query 2, but same filters as query 1). In my first table I have many keyfigures, in my 2nd table I just want to display that keyfigure with more detail based on the selection from query 1.
Since I can't filter on keyfigure level in VC itself I need one WEBAPI (url command) to do one additional filtering since I don't want to show all keyfigures in query 2 / table 2. I have been testing this first with supplying the WEBAPI string with the fixed (hardcoded) values and this works fine. It looks as follows :
'FILTER_IOBJNM=44RHE9MINFGXEBEXOI7S7UKE6;FILTER_VALUE=44VSUXQJNO2MG4CLOAF5M503I
The first string is the name of my keyfigure structure in my query, the 2nd string is the technical name of the keyfigure on which I want to restrict. Like it said, supplying the command url values hardcoded words so I thought i was finished...
Now I wanted to pass the right selected value from table 1 via the VC in the FILTER_VALUE field.
It looks as follows now :
'FILTER_IOBJNM=44RHE9MINFGXEBEXOI7S7UKE6;FILTER_VALUE=@KF_key'
But this doesn't seem to work although @KF_key contains the right value. KF_KEY should give the right technical keyfigure name.
Am I using the right syntax in the FILTER_VALUE part ? I have seen some topics on this forum where people also use the & symbol in some parts but I don't get it up and running
thanks
Message was edited by:
        Double U

Answer 1

Suddenly it works.
The correct syntax :
'FILTER_IOBJNM=44RHE9MINFGXEBEXOI7S7UKE6;FILTER_VALUE=<b>'&@KF_key&''</b>