For data, software, or any resource that has a complex arrangement of files, if structured metadata cannot be supplied, a common convention is to include a README file from the author. Written using a plain text file format, this should be a note to future users who wish to use the files. It should include information such as, scope, purpose, author(s), relevant dates, license for reuse, dependencies, field names/descriptions, and instructions for use.
See also:
68. Provide documentation for software