If a namestring begins with the name of a defined logical pathname host followed by a colon, then it will be parsed as a logical pathname. Both `*' and `**' wildcards are implemented. load-logical-pathname-translations on name looks for a logical host definition file in `'library:name.translations. Note that `'library: designates the search list (see section search-lists) initialized to the CMU Common Lisp `'lib/ directory, not a logical pathname. The format of the file is a single list of two-lists of the from and to patterns: