MAP template data					(library procedure)
(MAP template data1 data2 ...)

	outputs a word or list, depending on the type of the data input,
	of the same length as that data input.  (If more than one data
	input are given, the output is of the same type as data1.)  Each
	member of the output is the result of evaluating the template
	list, filling the slots with the corresponding member(s) of the
	data input(s).  (All data inputs must be the same length.)  In the
	case of a word output, the results of the template evaluation must
	be words, and they are concatenated with WORD.

	In a template, the symbol ?REST represents the portion of the
	data input to the right of the member currently being used as
	the ? slot-filler.  That is, if the data input is [A B C D E]
	and the template is being evaluated with ? replaced by B, then
	?REST would be replaced by [C D E].  If multiple parallel slots
	are used, then (?REST 1) goes with ?1, etc.

	In a template, the symbol # represents the position in the data
	input of the member currently being used as the ? slot-filler.
	That is, if the data input is [A B C D E] and the template is
	being evaluated with ? replaced by B, then # would be replaced
	by 2.