HTML 3.2, Map
"The MAP element has one attribute NAME which is used to associate a name with a map. This [NAME attribute] is then used by the USEMAP attribute on the IMG element to reference the map via a URL fragment identifier."
HTML 4.01, usemap attribute
"This attribute associates an image map with an element. The image map is defined by a MAP element. The value of usemap must match the value of the name attribute of the associated MAP element."