Autodesk Revit Architecture

[#1]

Hi,
I am having problems about exporting gbXML file from Revit Architecture 2013.
I have assighed materials for the windows, doors and walls in Revit 2013. After I export it as gbXML file, I find that in the gbXMl file, the doors and walls' materials are well delivered, while the materials for windows are not. I can not see the thermal and physical properties in gbXML. All what gbXML file has is "WindowType id="GSP4R"".
My purpose is use the gbXML file to do energy analysis using Energy Plus, but since the windows' materials are missing, how could I do the energy performence analysis ?

Thanks!
Best,
Na

[#2]

Please see discussion:  http://forums.autodesk.com/t5/Autodesk-Revit-MEP/REVIT-MEP-2012-GBXML-Window-Interpretation/m-p/3761...

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An opening of the opening type “OperableWindow” does not have a constructionidref associated. It has a windowtypeidref. The WindowType contains information about U-value, SolarHeatGainCoeff and Transmittance. For more info please see http://wikihelp.autodesk.com/Revit/enu/2013/Help/00001-Revit_He0/3251-Referenc3251/3325-gbXML_Sc3325...

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Thanks,

Anna