In FASTQ files created by the Illumina sequencing process, the sequence identifiers contain the coordinates of the DNA cluster that produced the sequence (among other things). This library parses the identifiers.
```rust extern crate illumina_coordinates;
fn main() { let line = "@M03745:11:000000000-B54L5:1:2108:4127:8949"; let seqid = illuminacoordinates::parsesequenceidentifier(&line).unwrap(); asserteq!(seqid.sequencerid, "M03745".tostring()); asserteq!(seqid.runcount, 11); asserteq!(seqid.flowcellid, "000000000-B54L5".tostring()); asserteq!(seqid.lane, 1); asserteq!(seqid.side, 2); asserteq!(seqid.swath, 1); asserteq!(seqid.tile, 8); asserteq!(seqid.x, 4127); asserteq!(seqid.y, 8949); } ```
Take this example sequence identifier:
@M03745:11:000000000-B54L5:1:2108:4127:8949
| Value | Meaning |
| --- | --- |
| M03745 | ID of the sequencing machine |
| 11 | run count for this machine |
| 000000000-B54L5 | ID of the flow cell. "B54L5" will be printed on the flow cell in this example |
| 1 | lane number. For MiSeqs, there's only one lane |
| 2 from 2108 | the side of the chip |
| 1 from 2108 | the swath (for MiSeqs, this is always 1. For HiSeqs, each lane is two tiles wide, and the first pass from left-to-right is swath one, then the returning pass on the other side of the lane is swath two |
| 08 from 2108 | the tile number. For MiSeqs, this is a number from 1 to 19 |
| 4127 | the x-position of the read in the tile, in arbitrary units |
| 8949 | the y-position of the read in the tile, in arbitrary units |
See https://help.basespace.illumina.com/articles/descriptive/fastq-files/ for more information.