Hi Frank, > Quincey, > Does the HDF Specification and Developer's Guide contain the > information John is looking for? Yes, I believe so. Quincey > John, > The above document includes the technical specification for HDF4. > While it is more general than the recent conversations, it does > contains extensive low-level technical information. The document > is available in PDF and Postscript formats at > ftp://ftp.ncsa.uiuc.edu/HDF/HDF/Documentation/HDF4.1r5/Spec/. > > > Regards, > -- Frank Baker > HDF documentation > > At 12:32 -0600 2003-10-06, John Caron wrote: > >Is there "file format" documentation for HDF-4, similar to what > >Quincy has for HDF-5 ?