list.

thead.grl:before,
thead.grl:after {
    display: table-row;
    content: icon(right) "generated content" icon(left);
    color: navy;
}

paragraph.

thead.grp:before,
thead.grp:after {
    display: table-row;
    content: paragraph(content(icon(right), "generated content", icon(left)),
                       border-width, 1, 
                       border-style, solid);
    color: navy;
}

division

thead.grd:before,
thead.grd:after {
    display: table-row;
    content: division(content(icon(down), "generated content", icon(up)),
                      border-width, 1, 
                      border-style, solid);
    color: navy;
}

rows, row or cell (all three give one or several rows).

thead.grr:before,
thead.grr:after {
    display: table-row;
    content: row(cell(icon(right)), 
                 cell("generated content"), 
                 cell(icon(left)),
                 border-width, 1, 
                 border-style, solid);
    color: navy;
}