a pattern with charts

[Robin14]

I am starting an afghan that uses charts for instructions, the charts uses symbols, a dot in a square means purl, a blank square means knit. But what I am not understanding is if every row shows purl symbols but the stitch key says purl on RS Knit on WS, Am I suppose to purl on the odd number rows and knit on the even number rows even though the chart shows purl symbols? The pattern is from Annies Attic Catalog of cables, and it is the Rose Aran Afghan.

Any help would be appreciated.

Robin14

[suzeeq]

A chart is a diagram of your knitting as seen from the RS. If you're working on RS rows, purl, if you're working on WS rows, knit and that will show as a purl on the RS.