What Is The Schema For These Ncbi Trace Database Dumps?

Question

[9e0b147a5b2778eb]

I'm trying to determine the schema for these NCBI trace database dumps:

http://ftp.ncbi.nih.gov/pub/TraceDB/Species.dump

http://ftp.ncbi.nih.gov/pub/TraceDB/TraceContent.dump

Some of the fields are reasonably obvious but others I have no clue whatsoever, anyone know where I can find this information?

Thanks!