Symphony.

I have a section called messages with an output parameter: id. This id is used to find comments placed on the message. I'm facing the following problem: there is also a need to lookup messages with the same tags as the current message. However, the ouput parameter is already in use (id). How can this be built?

Symphony 2.3 introduces multiple DS output params.

Until 2.3 you can check Parametrisator.

Great, that's what I was looking for, thanks!