请考虑以下代码：
digraph G {
node [shape=plaintext]
a [label=<<TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0">
<TR><TD ID="first" BGCOLOR="gray">first</TD></TR>
<TR><TD ID="second" PORT="f1">second</TD></TR>
<TR><TD ID="third" PORT="f2">third</TD></TR>
</TABLE>>];
b [label=<<TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0">
<TR><TD ID="first" BGCOLOR="gray">first</TD></TR>
<TR><TD ID="second" PORT="f1">second</TD></TR>
<TR><TD ID="third" PORT="f2">third</TD></TR>
</TABLE>>];
a:first -> b:first;
}
我收到了相当多的警告：
laci@nitehawk ~ $ dot records.gv -T pdf > records.pdf
Warning: Illegal attribute ID in <TD> - ignored
Warning: Illegal attribute ID in <TD> - ignored
Warning: Illegal attribute ID in <TD> - ignored
in label of node a
Warning: Illegal attribute ID in <TD> - ignored
Warning: Illegal attribute ID in <TD> - ignored
Warning: Illegal attribute ID in <TD> - ignored
in label of node b
Warning: node a, port first unrecognized
Warning: node b, port first unrecognized
- 根据文档 http://www.graphviz.org/doc/info/shapes.htmlTD的ID属性应该是合法的。我缺少什么？
- 如何引用单个单元格并在它们之间创建边缘？
为了完整起见，这里是实际有效的完整源代码：
digraph G {
node [shape=plaintext]
a [label=<<TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0">
<TR><TD PORT="c" BGCOLOR="gray">first</TD></TR>
<TR><TD PORT="d">second</TD></TR>
<TR><TD PORT="e">third</TD></TR>
</TABLE>>];
b [label=<<TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0">
<TR><TD PORT="c" BGCOLOR="gray">first</TD></TR>
<TR><TD PORT="d">second</TD></TR>
<TR><TD PORT="e">third</TD></TR>
</TABLE>>];
a:c -> b:c;
}
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