There is a call in a BR to get a literal parameter as a string. How I have done it in the past is have a normal parameter set the literal via a dashboard extender and then pull the literal in the BR if you want to go that route. Also I have taken a literal parameter and launched the BR (custom Calc) via a button in which you can just pass the parameter from the dashboard to the DM job then into the BR.
I created a universal dialog, that should be launched from different dashboard. Unfortunately all this dashboards are using different parameters for Entity. I have to embed the launching button (with other buttons) in an embedded component anyway so I thought it might be a god idea, to do the mapping using the literal parameters and it works great.
