PADS Logic的Tools--Options--Design中这个菜单是什么用的？

大家帮我看一下，
在PADS Logic的Tools--Options--Design最下面的Non ECO Registered Part中Include in Netlist 、Include in ECO to PCB、Include in BOM report 是做什么用的?
还有Non-electrical Part 中Include in Netlist 、Include in ECO to PCB、Include in BOM report 又是做什么用的?请各位帮忙解答一下，谢谢了！