Sets/Gets the FileURI
You can set a relative path. It will be resolved with the current host.
You can set local path by using file:// protocol
When you set the URI property the internal Blob with the file will be set to empty.
So for example:
&file.FileURI = "http://www.myfiles/file.pdf"
In this case the file.pdf will be the file in the data.
It always returns the absolute URI to the file