mobile

The mobile attribute, as used by the Standard Library, is solely used for attachments, representing objects that can be dragged from room to room. The “Rolling Objects” page uses it to represent objects that can be pushed from room to room (of course, those two uses might not work together).

In either case, if the mobile object can be picked up, be sure to use the CalculateHolding replacement, which fixes a bug where non-clothing mobile objects don’t count towards one’s holding (as mobile is an alias of worn).