Labels

Free space management

Attribute read/write

B-tree v1 (groups, chunks)

B-tree v2 (dense storage)

Chunked dataset I/O

Dataset read/write, hyperslab

Dataspace, dimensions

Datatypes (int, float, compound)

Dense groups (btreev2+heap)

Compression filter pipeline

Fractal heap (large objects)

Global heap (vlen data)

Hard/soft/external links

Local heap (link names)

Object header v1/v2, messages

Superblock v0/v2/v3

Symbol table (legacy groups)

Something isn't working

HDF5 C library (h5dump)

h5py compatibility

MATLAB compatibility

PyTables compatibility

Improvements or additions to documentation

This issue or pull request already exists

Trivial, < 1 hour

Epic, 2+ weeks (split)

Small, 1-4 hours

Medium, ~1 day

Large, 2-3 days

Very large, ~1 week