Hello, I'm trying to program a significant reduced version of writing HDF files for a small embedded systems. To do this I start to analyze h5 files after I have generated them by using HDFview. I'm using this link for reference: https://www.hdfgroup.org/HDF5/doc/H5.format.html#Intro Some questions arise that someone might be able to answer:
* If I generate an 'empty' H5 file I can analyze on a byte-by-byte level the superblock version 0. In my understanding this block has a size of 60 Bytes. This block should be followed by a 'group root table'. Unfortunately I could not find a description of such a table. If I generate an empty h5 file with HDFview it seems that right after the superblock no link in the file to the first B-Tree Node is given. The link is given in byte 80-84. Is this position fix and always the case? * In my example the B-Tree Node starts at byte 136. However there is some information coded between byte 61 and 135 that seems to point to the HEAP table and contains other information's also. Where can I find a documentation about the range between the superblock and the first B-Tree Node? Best Regards Markus
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