DOCBOOK-APPS: Running Tidy on generated content

In seeing the stylesheets the FreeBSD uses to generate their documentation I
came across the use of Tidy. I've downloaded it and added the corresponding
line to my Makefile. I am using XSLTproc when working with the 1.48
stylesheets, how can I apply tidy to each of the chunks generated before
doing any other processing? The fragment of the Stylesheet is listed below

Thanks,
Carlos

stories-chunk :
        @echo "Generating chunked content";
        @xsltproc --param html.ext "'.html'" xsl/xhtml/cal-chunk.xsl
stories.xml
        @echo "Done Chunking content";
# How do you make the line below work
#       @tidy *.html > *.html
        @mv *.html stories;
        @echo "Moved chunks to their directory";

-- 
Carlos E. Araya
---+ WebCT Administrator/Trainer
 P | California Virtual Campus
 - | C/O De Anza College
 G | 21250 Stevens Creek Blvd
---+ Cupertino, CA 95014

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