It read such deadlocks graph XDL and blocked process report BPRP events

from following available surces:

    Extended events (inc system health session)
    Extended events ring buffer
    Trace file (server side trace)
    Trace table (generated from SQLProfiler)
    Event Notifications
    Trace file with an *.trc ext (using @SrceDesc)
    Extended events files having *.xel ext (using @SrceDesc)