td.di-d {background: #FFD} /* rfc-1345 digraph */
td.di-prop {background: #FED} /* proposed digraph */
td.di-a {background: #EFD} /* ascii */
td.di-d {background: #FFD} /* rfc-1345 digraph */
td.di-prop {background: #FED} /* proposed digraph */
td.di-a {background: #EFD} /* ascii */