User talk:Halfacat

A belated welcome!
Here's wishing you a belated welcome to Wikipedia, Halfacat. I see that you've already been around a while and wanted to thank you for your contributions. Though you seem to have been successful in finding your way around, you may benefit from following some of the links below, which help editors get the most out of Wikipedia:
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Again, welcome! — Mike moral  ♪♫  02:38, 31 May 2013 (UTC)

A quick note
I undid some of your recent edits to re-include the categories that you removed. Generally, categories refer to what something is or was so companies no longer around are still in the categories that best fit. It's the same logic as to why Charles Dickens is in Category:English novelists even though he's long dead or that Seaboard Coast Line Industries (gone since 1980) is listed under Category:United States railroad holding companies still. — Mike moral  ♪♫  02:57, 31 May 2013 (UTC)

A word about categories
Hello Halfacat, my name is Howicus. I appreciate what you're trying to do with mining company categories, but there's a little quirk of the category system that you need to know about. Categories contain other sub-categories. An article should only be in the lowest-level, most specific category possible. Take, for example, Lundin Mining. Now, Lundin Mining is in. And Copper mining companies of Canada is in the larger category, which is itself in the even larger  (I could keep going, but you get the idea). And since Lundin Mining is in the first category, it's already in the others, and the other categories shouldn't be put on the Lundin Mining page. I hope this explains things well, feel free to contact me if you have any more questions. Howicus (talk) 03:54, 31 May 2013 (UTC)