This STYLE statement creates the style element header. By default, ODS uses header to render both spanning headers and column headers. This style element uses different foreground and background colors from cellcontents. It uses the same font face (Arial or Helvetica) and the same font_style (roman) as cellcontents. However, it uses a bold font weight and a large font size. 
      style header /
         background=very light blue
         foreground=blue
         font_face="arial, helvetica"
         font_weight=bold
         font_style=roman
         font_size=5;