Need help with formatting?
Start by preparing your data set in a spreadsheet programme of your choice.
The first row of your spreadsheet should have the same headings as the following example. Note that the case is important.
Put each node in your diagram on a different row in your table, as in the example above, then export as a tab-delimited text file.
You may also include columns for "x_offset" and "y_offset" (underscore, not hyphen). You might want this in the case that you have overlapping nodes. Specify the number of cm to move the node along the x- or y-axes.