What file format contents starts with "URES"?

I have a number of files that contain data in a format I am not familiar with. All of the data files begin with the same byte sequence, presumably a file header, and the sequence is "URES". I'm assuming that these files are some kind of resource file, perhaps a collection of data or other files all embedded into one file; that's just a guess however.

Does anyone know what format this is/might be?

If so, how would I interrogate the file? Are there applications that let me open these kind of files? Do you know of any libraries or APIs that I can use to gain programmatic access the data?

Have you tried running the unix file command on it?

I know of one file format that starts with URES. It's a data file used for Watchtower Library. I have yet to understand the format myself.

maybe its something from the Universal Resource Editor (URE) that comes with the OS/2 Toolkit? just a guess...

it is from the watchtower library files and they use meps to encode it which is thier own librarys and encryption software so to crack it would take you a long time.