The documentation (Node Shapes | Graphviz) for HTML styles says ROUNDED and RADIAL for tables, and RADIAL for cells, but a later example shows style="invis" !?
Hmmm!
lib/common/htmllex.c lists: ROUNDED, RADIAL, SOLID, INVISIBLE, INVIS, DOTTED, and DASHED.
And they all work for tables and for cells!
Go and make your tables even prettier!
/**************************************************
The documentation for HTML style says that only ROUNDED and RADIAL are legal values. This is incomplete. stylefn in lib/common/htmllex.c lists the following:
"ROUNDED", "RADIAL", "SOLID", "INVISIBLE", "INVIS", "DOTTED", "DASHED"
All work at the table-level and the cell-level.
********************************************************************/
digraph ETL {
rankdir=LR
TA [shape=none label=<
<table bgcolor="red:green">
<tr><td style="invis">top dog invis</td></tr>
<tr><td style="dotted">top dog dotted</td></tr>
<tr><td style="dashed">top dog dashed</td></tr>
<tr><td style="rounded">top dog rounded</td></tr>
<tr><td style="solid">top dog solid</td></tr>
<tr><td style="radial">top dog radial</td></tr>
<tr><td style="invisible">top dog invisible</td></tr>
</table>>]
{rank=sink
TB [shape=none label=<
<table style="invis" bgcolor="red:green">
<tr><td style="dotted">invis table</td></tr>
<tr><td style="dashed">top dog</td></tr>
</table>>]
TC [shape=none label=<
<table style="rounded" bgcolor="red:green">
<tr><td style="dotted">rounded table</td></tr>
<tr><td style="dashed">top dog </td></tr>
</table>>]
TD [shape=none label=<
<table style="dashed" bgcolor="red:green">
<tr><td>dashed table </td></tr>
<tr><td >top dog </td></tr>
</table>>]
TE [shape=none label=<
<table style="dotted">
<tr><td >dotted table </td></tr>
<tr><td style="dashed">top dog </td></tr>
</table>>]
TF [shape=none label=<
<table style="solid">
<tr><td style="dotted">solid table</td></tr>
<tr><td style="radial" bgcolor="blue:yellow">top dog</td></tr>
</table>>]
TG [shape=none label=<
<table style="radial" bgcolor="red:green">
<tr><td style="dotted">radial table</td></tr>
<tr><td style="invisible">top dog </td></tr>
</table>>]
TH [shape=none label=<
<table style="invisible" bgcolor="red:green">
<tr><td style="dotted">invisible table</td></tr>
<tr><td style="dashed">top dog</td></tr>
</table>>]
}
TA->{TB TC TD TE TF TG TH}
}