Schema or standard format for product sheet

Hi all,
I'm new user of this list. I'm currently working in a company which sells technical products through multiple distribution channels (shop, dealers and e-shop) and I'm writing most of the product sheets.
I would like to know if there is a standard or an existing schema to format a product sheet in XML. I have created my own one few years ago but I'm currently using DocBook to do that.
But if there is a "universal" and wide-used format for product sheet (with schema and XSL/XSL-FO style sheets), I will change to use it.

Thank you for your help
Vincent


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