Clarification on derivation of SV length and type

[olivia-gc]

Hi, I am trying to understand how SURVIVOR filters and merges vcfs from different callers.

I just wanted to confirm that SURVIVOR tests multiple strategies to derive SV length depending on the type and caller.
For ex: END - POS2 (instead of END - POS) for TRAs when SVLEN is not available.

I also wanted clarification on dealing with BNDs during merge. From my understanding, SURVIVOR will type BNDs to INV or TRA.
With this, if I have vcfs for a sample that are separated by SV type, should I be merging INV vcfs from one caller with BND vcfs from another to see if there is a consensus call set between them?

Thank you very much for your help