BSDF file rotation tool?

I have BSDF (XML) files for horizontal blinds. I'd like to rotate them to be vertical blinds. Is there a tool out there that can perform such a coordinate transformation?

There is no tool for transforming XML files that I am aware of, unless WINDOW has such a facility. However, you can specify whatever "up" orientation you like using the Radiance scene primitive (type "BSDF") as described in the Radiance reference manual at http://radsite.lbl.gov/radiance/refer/ray.html.

If you really need to rotate an XML, there is a way to do it using genBSDF, but you will lose accuracy in the process.