Returns a String with the name of a project or library file containing an object. In Elipse Water Studio, this property returns the full path of a project or library, such as c:\folder\folder\volume.prj. At run time, the objects executing in an Elipse Water Viewer always return an empty String. However, objects executing in a server return the relative path of a project or library, according to the way it is stored in the Domain, in this case volume.prj. This value is determined only at request, thus it is not recommended to create Links to this property. This is a read-only property.