I was having a think this morning about my sitemap.xml for my website.

Say we have,

Product group 1
product 1
product 2
product 3
product 4

Product group 2
product 1
product 2
product 3
product 4


would you structure the xml map in this manner so product group comes first then the inner products relating to that group, then start the next product group and so on or just list the urls.

thank you in advance, I hope I have explained this ok?