INTERPRETER .'s (xt)

Given the definition below:
        TARGET
        ?OPT -OPTIMIZER
          0 CONSTANT #TEST
        !OPT

What is the significance of "(xt)" in INTERPRETER .' output?
        TARGET ok
        ' #TEST .' #TEST ok
        INTERPRETER ok
        ' #TEST .' (xt) #TEST ok
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Received on Thu Jan 03 2002 - 11:08:45 PST