How to reference nodeparts in TikZ graphdrawing library?

Question

Context: I would like to connect nodeparts in a TikZ graph that is positioned by the graphdrawing library. Unfortunately it fails to find the node, when I do attach the .first, .second, ... suffix.

Question:

1. Is there something wrong in this example?
2. Is there an easy way around this limitation?

Failing minimal working example with graphdrawing:

\documentclass{minimal}
\usepackage{tikz}
\usetikzlibrary{graphdrawing,graphs,shapes}
\usegdlibrary{layered}
\usepackage[active,tightpage]{preview}
\PreviewEnvironment{tikzpicture}
\begin{document}
\begin{tikzpicture}[layered layout]
\node
    [rectangle split, rectangle split parts=4, text ragged]
     (NodeA)
    {
        Node A
        \nodepart{two}
        Part two
        \nodepart{three}
        Part three
        \nodepart{four}
        Part four
    };
\node
    [rectangle split, rectangle split parts=3, text ragged]
     (NodeB)
    {
        Node B
        \nodepart{two}
        Part two
        \nodepart{three}
        Part three
    };
\draw (NodeA.two) edge[->] (NodeB.three);
\end{tikzpicture}
\end{document}

Minimal working example without graphdrawing:

\documentclass{minimal}
\usepackage{tikz}
\usetikzlibrary{graphs,shapes}
\usepackage[active,tightpage]{preview}
\PreviewEnvironment{tikzpicture}
\begin{document}
\begin{tikzpicture}
\node
    [rectangle split, rectangle split parts=4, text ragged]
     (NodeA)
    {
        Node A
        \nodepart{two}
        Part two
        \nodepart{three}
        Part three
        \nodepart{four}
        Part four
    };
\node
    [rectangle split, rectangle split parts=3, text ragged]
     (NodeB)
    {
        Node B
        \nodepart{two}
        Part two
        \nodepart{three}
        Part three
    };
\draw (NodeA.two) edge[->] (NodeB.three);
\end{tikzpicture}
\end{document}

Answer 1

I am not convinced that the use of multipart nodes in combination with graph drawing is a felicitous match. In particular, it is rather hard to see how the automatic placement algorithms will be able to work properly in this kind of case.

With your example, for instance, I get the following result

\documentclass[tikz,border=10pt]{standalone}
\usetikzlibrary{graphdrawing,graphs,shapes.multipart}
\usegdlibrary{layered}
\begin{document}
\begin{tikzpicture}
  \graph [layered layout]
  {
    nodeA [as={Node A \nodepart{two} Part two \nodepart{three} Part three \nodepart{four} Part four}, rectangle split, rectangle split parts=4, text ragged]
    ,
    nodeB [as={Node B \nodepart{two} Part two \nodepart{three} Part three}, rectangle split, rectangle split parts=3, text ragged],
  };
  \draw (nodeA.two) edge[->] (nodeB.three);
\end{tikzpicture}
\end{document}

Doubtless this can be improved, but I wonder what work exactly the multipart nodes are intended to do and whether it would not be better, if automated layouts are required, to stick to nodes with simpler internal structures. (Or at least not rely on anchors to join them explicitly.)

The reason for these doubts is that it seems the only way to get the drawing done is to do it outside the scope of the \graph command, which means that the algorithm cannot take account of the desired edges.

I know next to nothing about the graph drawing libraries, however, so perhaps this is possible.

\begin{rant}
The Tikz manual documents the use of nodes here very poorly, in my opinion. 
Crucial information for actual use (e.g. how to include more than a single 
letter in a node) is either mentioned but not given ("you can do this, but 
we're not going to tell you how!") or provided only implicitly ("we won't 
bother to explain 'as' but if you trawl through all the examples, maybe 
you'll realise that it can be used to assign content which differs from 
the node name"). 
TikZ is great and the documentation is mostly overwhelming but good. 
However, the coverage of the graph drawing stuff seems more concerned to 
show off technical wizardry than to tell the reader anything useful. 
It wants to *impress* you.
Whether the reader can do anything useful with its wizardry is beside 
the point.
\end{rant}