'Properties' object passed into the WL.upload method.
The id attribute of the tag containing info about the file to upload.
Indicates whether the uploaded file should overwrite an existing copy. Specify true or "true" to overwrite, false or "false" to not overwrite and for the WL.upload method call to fail, or "rename" to not overwrite and enable SkyDrive to assign a new name to the uploaded file.
The path to the file to upload.