<letter>::={_&;a-zA-Z}
<character>::={_&;a-zA-Z0-9}
<ridentifier>::=<character>[<ridentifier>]
<identifier>::=<letter>[<ridentifier>]
<data>::=<character>[<ridentifier>]
<headerlist>::='<th>'<identifier>'</th>'[<headerlist>]
<header>::='<tr>'<headerlist>'</tr>'
<datalist>::='<td>'<data>'</td>'[<datalist>]
	|'<td/>'[<datalist>]
<row>::='<tr>'<datalist>'</tr>'
<body>::=<row>[<body>]
<<table>>::='<table>'<header><body>'</table>'