"file:/some/where/file/name" or file name "/some/where/file/name" map is abstraction of IO to/from a text file. The format of text file is space separated.
author's homepage is www.fml.org/home/fukachan/.
Also, visit nuinui's world :) at www.nuinui.net.
For questions about FML, e-mail <fml-bugs@fml.org>.