Here's the first cut SRFI documentation I've created for make-directory-files-generator:

(make-directory-files-generator dir [dotfiles?])    →    generator       (procedure) 

Return a SRFI 158 generator of the file names in directory dir. The dotfiles? flag (default #f) causes dot files to be included in the list. Regardless of the value of dotfiles?, the two files . and .. are never returned.

Like directory-files above, the directory dir is not prepended to each file name in the results the generator returns.

The generator approach is particularly useful when the number of items in a directory might be "huge", which has been a common paradigm when using a file system as a document database.

- Harold