One of the disadvantages of using a binary format is that it can be difficult to view and edit the data compared to ASCII files. However, there is a generic viewing and editing tool available for HDF5 that can viewed to traverse the hierarchical tree associated with an HDF5 file and edit any of the information in the file. The viewer is written in JAVA so it can run on multiple platforms. The viewer can be downloaded at: http://hdf.ncsa.uiuc.edu/hdf-java-html/hdfview/.