Hi Jim, Courtney! Thanks very much for the suggestions. I'll try out the ideas you've mentioned. I'll update you of my findings. It just seems to me that if MWiki allows custom tags, then it should allow a reasonable number of embeddings of custom tags within custom tags. That is, it should take the innermost custom tag, evaluate it, then use it as $input to the enclosing custom tag, evaluate it, and so on... until we've reached the outermost custom tag, and then convert to the final XHTML. Do we see some shades of recursion here? Filip Send instant messages to your online friends http://uk.messenger.yahoo.com