OBJNUM create(LIST parents)
This function creates and returns the objnum of an object with the parents in the list parents, which should be a list of objnums referring to existing objects. If any of the parent objnums do not refer to existing objects, then create() throws the error ~objnf.
ancestors() | children() | chparents() | create() | data() | del_objname() | destroy() | has_ancestor() | lookup() | objname() | objnum() | parents() | set_objname()