EDIT by MDH 2011-12-22: I believe this task has been obviated by the proposed (and partially-implemented) change from using <argument> to using <label>. Setting this task to Completed.

Note to self: I thought I had made substantial amendments to the schema that would permit us to use <argument> inside e.g. <p>, because that's where our marginal arguments most often show up. However, in the Le Blanc text, that seems to be failing, so I need to revisit it. The text has been marked up in such a way that open ps and divs are being closed before and argument and opened again afterwards, and when I try to refactor appropriately, the code turns out not to be valid. Either the validation process is failing somehow, or the schema is not the most recent, or perhaps my modifications didn't go far enough.