*Feature: DuplexUnit
{
    *FeatureType: PRINTER_PROPERTY
    *BidiQuery: DuplexUnit
    {
       *QueryString: "\Printer.Configuration.DuplexUnit:Installed"
    }

    *BidiResponse: DuplexUnit
    {
       *ResponseType: BIDI_BOOL
       *ResponseData: ENUM_OPTION(DuplexUnit)
    }

    *Option: FALSE
    {
        *BidiValue: BOOL(FALSE)
    }

    *Option: TRUE
    {
        *BidiValue: BOOL(TRUE)
    }
}

*Feature: PhotoTray
{
    *FeatureType: PRINTER_PROPERTY
    *BidiQuery: PhotoTray
    {
       *QueryString: "\Printer.Configuration.PhotoTray:Installed"
    }

    *BidiResponse: PhotoTray
    {
       *ResponseType: BIDI_BOOL
       *ResponseData: ENUM_OPTION(PhotoTray)
    }

    *Option: FALSE
    {
        *BidiValue: BOOL(FALSE)
    }

    *Option: TRUE
    {
        *BidiValue: BOOL(TRUE)
    }
}