Today, I tested a  ".bpm"  file downloaded at SDL's AppStore;

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appstore.sdl.com/.../

It is quite easy to extract
but,
I could not figure out how to relate its information properly.

Is there any kind of information about its design/definition/relationship/structure or something ?

for instance )
it starts somewhat easy, the upper one is source, lower one is target
but
when it goes down, it looks not so easy to figure out.. (OR they are just garbage?)

I just extracted it with pairs, its order is not modified. 
I think I have to change its order/grouping (source/target differently) but, I do not have any kind of clue...

Thanks