Category talk:Sets for level 20

I've always been curious why we have this category...I can't find anything special about the enhancements listed here... what's the difference between this and Category:Sets for levels 15-20? -- Agge (talk) 01:03, 7 January 2009 (UTC)

That's a valid question. I'll have to think way back to when we were putting the IO templates together to figure out if there's an actual reason for the category. What I can tell you off the top of my head, though, is that it's auto generated through inheritance from {{InvSetOverview}}. --Eabrace 04:36, 7 January 2009 (UTC)

There's this part from that template that puts them in this category:

-->{{#ifexpr: ({{{1}}})<=20 and ({{{2}}})>=20|[[Category:Sets for level 20]]}}<!--

My brain is not parsing what that means. If the first level argument is less than 20 and the second argument is more than 20, add it to this category? Why is this level special, and level 30 and level 40 are not? -- Agge (talk) 08:03, 7 January 2009 (UTC)