Halliday & Matthiessen (1999: 94-5, 96):
The network of selection is inter-axial in that it relates syntagmatic specifications to paradigmatic ones; it 'cuts across' the paradigmatic organisation of the ideation base, establishing correspondences between paradigmatic types through the syntagmatic functions associated with them, as we have just illustrated by reference to Figures 1-12 and 2-6. We can trace one further example from sequence via figure to element: see Figure 2-17.
