Frameset.is_frame_link_to_file property. Gets or sets a value indicating whether the web page or document file name specified in the [Frameset.frame_default_url](../frame_default_url/) property is an external resource the frame is linked with....Frameset.is_frame_link_to_file property. Gets or sets a value indicating whether the web page or document file name specified in the [Frameset.frame_default_url](../frame_default_url/) property is an external resource the frame is linked with.