Hi all,

following the e-mail conversation from Konstantin. The next topic we discussed was the event flow.

What I want to have (especially for commissioning phases for an experiment) is the possibility to have some kind of online calibration setup. 
So one has some kind of detector X which sends data and another detector Y which also sends data and I want to correlate the two detectors after applying some kinds of cleaning steps to the data. 

Mail me: Having the event flow maybe „orthogonal“ - not sure how to say this correctly but at the moment there is only one flow in a linear direction.
So something like was my intuition:
eventX -> decodeX -flow-> cleanX -> buffer -> correlation of X/Y
                                      ^
                                      |
eventY -> decodeY -flow-> cleanY ->   |


Mail Konstantin: yes, you will have to explain what you mean. right now, the flow is linear, as is typical for most physics analysis.
                 however, at any point one is permitted to create new flow events and inject them to the top of the modules pipeline, this adds "loops".

So how would injection into the top help? So I clean x/y and than I inject them back to the top and create a third flow for the correlation?
If this is true maybe a simple example or some more words on the documentation would help. I would be also willing to do that. After I fully understand how this would be possible.

Best,
Marius