#[  f: 0->1; n: 1.. (integer)
    l, c, r
[<numeric-size>] <width> <justification>
width is widest line in a cell     f [default]
width is fraction of table   <f>t
width is specific length  <n>pt|px|in|cm   [...not portable?]
width width is remaining (evenly divided) *
]#

@@@argtype table_hpos |
  horizontal formatting in a table cell. One of 'l', 'c' or 'r' for each
  cell in a row. If there are fewer positions than cells in a row, the
  last value is repeated.  Extra positions generate a warning. Default is 'l'
  #  :pattern ((f^|(0?\.'uint't^|\\*))[lcr]?^|\s)+
#  :pattern ((f^|'float't^|\\*)[lcr]?^|\s)+
   :pattern ([.\w]+^|\*^|\s+)+
  #:pattern (l^|c^|r^|\s)+
  :python_cast (lambda s : s.split())
@@@

@@@argtype table_hline |
   a table's horizontal line description; one or more of 'top',
   'head', 'inner', 'bottom', or a row number for a line at the bottom
   of that row
   #:pattern (top^|head^|inner^|bottom^|\d+^|\d+:\(\d+\-\d+\)^|\s+)*
   #:python_cast (lambda s : s.split())
@@@

@@@argtype table_vline |
  a table's vertical line description; one or more of 'outer', 'inner,
  or a column number for a line at the right of that column
  #  :pattern (outer^|inner^|\d+^|\d+^|\d+:\(\d+\-\d+\)^|\s+)*
  #  :python_cast (lambda s : s.split())
@@@

@@@argtype table_span |
  a list of spans in a table in the form (X,Y):N (no spaces), where
  (X,Y) is the position in the table (zero origin in the top left
  corner) and N is the number of columns or rows in the span
  #:pattern  (\(\d+(?:-\d+)?,\d+(?:-\d+)?\):\d+\s*)*
  #:python_cast (lambda s : s.split())
@@@

@@rowcolor.tex s : \colorrow{*s*} @@

@@table rows.rest
  :id
  @caption_arguments@
  :center.bool true
  :indent.length 1em
  :header.bool true
  :allow_break.bool false
  :hline.table_hline 
  :vline.table_vline
  :grid.bool false
  :cell_hpos.table_hpos c
  :header_font.font i
  :font.font_list r
  :colspan.table_span
  :rowspan.table_span
  :leading.float 1.3
  :colsep 4pt
  :
  @eval table.Table(K) eval@
@@

@@tbl spec.figure_id :
  @reference *spec* | Table @
@@