@type problems

[lb42]

In the dramatic texts I am encoding, it's important to distinguish various kinds of division within the front matter. The currently closed list of values for @type (which seems to apply whether this is a division of front or body) doesn't allow me to distinguish divs containing a list of costumes or divs containing a summary of the different scenery and the programme, both of which are very frequent in my data. If the list were extensible this wouldn't be a problem...