Column names SNP data PopGenome

Question

[Mr Locuace]

Hello, for PopGenome R package, I would like to create an input file according to the format used in page 14 of the following document (see link below). This format is based on the 1001 Genomes project (Arabidopsis). However, I cannot find what do the columns represent (column names). The following example ("snp_file.txt") is provided in the "data" subfolder of the R package:

Agu-1   1   110 G   T   26  4   1   1
Agu-1   1   115 C   T   23  3   1   1
Agu-1   1   138 T   C   23  3   1   1
Agu-1   1   346 C   T   40  7   1   1
Agu-1   1   502 T   C   40  9   1   1
Agu-1   1   508 T   C   40  7   1   1

I guess this is a trivial question but I am a beginner in the genomics field. I went into the 1001 Genomes project webpage but could not find the information I am looking for.

https://cran.r-project.org/web/packages/PopGenome/vignettes/An_introduction_to_the_PopGenome_package.pdf