Is there a free XSL stylesheet to convert HTML into XHTML?

Hi!
I am using Java API for XML processing, I store my HTML document in
Document object.
Then I use the default Transformer to dump the Document to output.
Unfortunately, what I get is HTML (some tags are not closed properly and
META
tag is in uppercase...)
I would like to know if there is a stable XSL stylesheet, that I can use
to produce XHTML.

Thanks!


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