Override the default $acronym-seq$ formatting to look for a role

attribute in acronym DocBook tags and use this for the title attribute
in acronym HTML4 tags, which will then give a mouseover definition of
the acronym.

share/sgml/freebsd.dsl

@@ -71,6 +71,23 @@
           ;; Create docformat navi link for HTML output?
           #f)
 
+;; Taken from Norm's stylesheets; modified to add support for TITLE so
+;; that we get a mouse over definition for acronyms in HTML output.
+
+	(define ($acronym-seq$ #!optional (sosofo (process-children)))
+	  ;; FIXME: html4 only
+	  (let ((title (attribute-string (normalize "role") (current-node))))
+	    (if title
+	  (make element gi: "ACRONYM"
+	        attributes: (list
+			     (list "TITLE" title)
+	                     (list "CLASS" (gi)))
+		sosofo)
+	  (make element gi: "ACRONYM"
+	        attributes: (list
+	                     (list "CLASS" (gi)))
+		sosofo))))
+
         (define (book-titlepage-recto-elements)
           (list (normalize "title")
                 (normalize "subtitle")