[cjkarr]

I should have been a bit clearer in my writing.

While this Spotlight plugin mainly targets EPUB documents, it's actually a more general OCF reader:

http://www.idpf.org/ocf/ocf1.0/download/ocf10.htm

To be more precise in my question, are there any other OCF documents floating around that do not use XHTML?

Thanks for prompting the clarification.