Shows the position number of a reinforcing bar as defined by XS_​REBAR_​POSITION_​NUMBER_​FORMAT_​STRING.

For reinforcing bars in tapered bar groups in rebar sets, the REBAR_POS format is defined by XS_​REBARSET_​TAPERED_​REBAR_​POSITION_​NUMBER_​FORMAT_​STRING , and if that is not set, then by XS_​REBAR_​POSITION_​NUMBER_​FORMAT_​STRING.