What is an SPP file?
An SPP project is a virtual project which can contain subfolders and files. An SPP is used to organize folders and files which are not necessarily in the same physical location. An SPP file can be useful when wanting to batch process a number of XML files for example. If you would like to transform many XML instance files with one stylesheet you could create a folder in the SPP project, put all of your XML files in this folder, and then set the properties of the folder so that all XML files in the folder will be transformed by that particular stylesheet.
