The early history of the SAM/BAM format
While I was looking for an ancient email on my old (first) macbook, I noticed the numerous email exchanges during the early days of the SAM/BAM format. Here is a brief summary. The ideas below were proposed by various people in the 1000 Genomes Project analysis group.
- 2008-10-21: SAM got its name.
- 2008-10-22: The first day: fixed columns and optional tags; extended CIGAR and binning index.
- 2008-10-24: Compression suggested. RAZF started. Streamability emphasized.
- 2008-11-01: 2-byte tags; mate positions as fixed columns.
- 2008-11-03: Adopted the text/binary dual format. RAZF implemented.
- 2008-11-06: Sequence dictionary. The very first draft of SAM/BAM spec circulated.
- 2008-11-07: BGZF proposed. BAM got its name.
- 2008-11-10: Linear index.
- 2008-11-12: Read group.
- 2008-11-14: BGZF implemented. BAM on top of RAZF working.
- 2008-11-18: Combining binning and linear indices.
- 2008-11-20: sort/merge/pileup/faidx implemented.
- 2008-11-21: tview prototype working.
- 2008-12-08: Final draft sent to 1000g. Adopted the MIT license.
- 2008-12-22: First public release of samtools. It is still working on most BAMs nowadays.
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