er, when <I><B>BORDER</B></I> is 1 and both table and cell borders
are on and <I><B>CELLSPACING</B></I> is less than 2, anomalies can arise
in the output, such as gaps between sides of borders which should be
abutting or even collinear. The user can usual get around this by increasing
the border size or the spacing, or turning off the table border.
<P>
As an example of HTML labels, the dot input 
<XMP>
digraph structs {
    node [shape=plaintext]
    struct1 [label=<
<TABLE BORDER="0" CELLBORDER="1" CELLSPA