Table 1.
The three described FASTQ variants, with columns giving the description, format name used in OBF projects, range of ASCII characters permitted in the quality string (in decimal notation), ASCII encoding offset, type of quality score encoded and the possible range of scores
| Description, OBF name | ASCII characters |
Quality score |
||
|---|---|---|---|---|
| Range | Offset | Type | Range | |
| Sanger standard | ||||
| fastq-sanger | 33–126 | 33 | PHRED | 0 to 93 |
| Solexa/early Illumina | ||||
| fastq-solexa | 59–126 | 64 | Solexa | −5 to 62 |
| Illumina 1.3+ | ||||
| fastq-illumina | 64–126 | 64 | PHRED | 0 to 62 |