Complex XSL MIME Type

I know mime types were handled before, but I haven't seen one about my
question.

I'm 'designing' an API to access a product that can create output of
various formats: it creates PDF, PCL5,  XHTML, XSL-FO, XSLT (that creates
XSL-FO), XSLT (that creates XHTML).
To identify the type of output you want from the product, I thought to use
mime-types for all of these types. I only have a problem with the last 3
types.

I read before in this list that I would have to choose application/xsl+xml,
but all of these last 3 types qualify for that, and I need a unique
identifier for all of them.

Should I go for:
application/xslfo+xml
application/xslt+xslfo+xml
application/xslt+xhtml+xml

Or should I just not use mime to identify the output format?

Thanks in advance!
-----
Klaas Bals  -  Project Leader & Technical Designer
Inventive Designers
Direct Phone: +32 - 3 - 8210183
Office Phone: +32 - 3 - 8210170
Office Fax: +32 - 3 - 8210171
Email: Klaas_Bals@xxxxxxxxxxxxxxxxxxxxxx





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