write-page ; String Xexpr -> true
;; given a file name and an X-expression, create an HTML file
;; produce true if successful
ul ; (Listof Xexpr) -> Xexpr[ul]
;; create an HTML list from a list of X-expressions
li ; Xexpr -> Xexpr[li]
;; create an HTML item from an X-expression
table ; (Listof (Listof Xexpr)) -> Xexpr[table]
;; create an HTML table from a table of X-expressions
tr ; (Listof Xexpr[td]) -> Xexpr[tr]
;; create an HTML table row from a X-expression cells
td ; Xexpr -> Xexpr[td]
;; create an HTML table cell from an X-expression