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I've just noted that .Net users seem to have created a load of tags like "2.0", "3.5", "4.0". This seems to me to be a bad idea, (though I realise that some .Net programmers believe that SO was created for them alone) and they should all be retagged as .Net2.0 etc. and the creation of numeric tags be banned in future.

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I thought, we have discussed that before, but it's not part of the faq. +1 – Ladybug Killer Aug 4 '10 at 11:49
I suspect this is people entering ".NET 2.0" (for example) into the tags field without realising it is space separated. – Richard Aug 4 '10 at 12:22
I agree. A tag should tell you something all by itself. It shouldn't have to rely on the context of the question. .net2.0 tells you something, 2.0 tells you nothing. – raven Aug 4 '10 at 12:24
@Ladybug Killer: I seem to remember this coming up in the past as well. I think integer values are banned, so [3] and [2008] are invalid tags, but floats get through. – Bill the Lizard Aug 4 '10 at 12:30
@raven Quite, but this question was prompted by a user who used only the "3.5" tag, no others. – nb69307 Aug 4 '10 at 12:32
@Bill Integers seem to get through too - see… - which is in a way a reasonable tag, I suppose. – nb69307 Aug 4 '10 at 12:34
I wish I could DV weblog for reinserting the invective. @Neil, thanks for softening the top of it :) Now it's just pure fact. – devinb Aug 4 '10 at 12:39
@devinb: Stop misspelling my name, man. – JSONBog Aug 4 '10 at 12:40
@Neil: Grrr... Intel. Naming products after numbers continues to be a bad idea. – Bill the Lizard Aug 4 '10 at 12:41
@Weblog then how to refer to you? @We(bl|lb)og – devinb Aug 4 '10 at 12:42
So much for my new programming language. I was going to name it 42 – Tim Post Aug 4 '10 at 13:09
I've at least retagged 1.3 and 1.8 on SO. Both had only 2 questions attached. For the other tags like 2.0 and so on, there are too much :) – BalusC Aug 4 '10 at 15:15
This is still a problem. There are still 32 questions tagged "4.0" on SO. Can we just get rid of them and ban these tags? – John Saunders Apr 20 '11 at 17:18

A quick look through the questions tagged [2.0] reveals that it's not just .NET users. That's unfortunate, since it will make retagging a manual process. That ambiguity makes me even more strongly in favor of banning the tags.

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Dang, and I was just about to ask a question about calculating the next digit of 3.14159265358979323846264338327950288419716939937510582097494 45923078164062862089986280348253421170679821480865132823066470 93844609550582231725359408128481117450284102701938521105559644 62294895493038196442881097566593344612847564823378678316527120 19091456485669234603486104543266482133936072602491412737245870 06606315588174881520920962829254091715364367892590360011330530 54882046652138414695194151160943305727036575959195309218611738 19326117931051185480744623799627495673518857527248912279381830 1194912983367 – tvanfosson Aug 4 '10 at 12:42
@tvan: I was wondering what the folks at the Math SE site would think of banning numeric tags. Mathematicians name the really important numbers though. :) – Bill the Lizard Aug 4 '10 at 12:43
What about the editor 6? – Andrew Grimm Aug 4 '10 at 13:25
@tvanfosson: – Kip Aug 4 '10 at 13:34
@kip - I figured it was a known issue so I didn't report. I vaguely recalled seeing something about it, but I thought it was fixed. Apparently, he never got around to implementing it for comments. – tvanfosson Aug 4 '10 at 14:04
What about the number of the beast? – Pëkka Aug 4 '10 at 15:19
My Chrome 5 feels all jerky and slow because of that format bug. Strange. – Pëkka Aug 4 '10 at 15:20
Well, you also have [Web-2.0] and lots of other 2.0s. – jjnguy Aug 4 '10 at 17:23
@tvan no fixes "work" for variable size areas like comments. Sorry. – Jeff Atwood Aug 4 '10 at 22:12
@Jeff -- "alternate implementation", then. – tvanfosson Aug 5 '10 at 0:10


As Bill said, the questions would have to be manually separated in most cases.

I created a Data Explorer query to find all the numeric-only tags in the system and the question count for each.

It doesn't look that bad to clean up. Basically go through each one, retag the ones that don't belong to a major group (i.e., .NET), and then get a mod to merge the rest. There aren't very many popular groups in the list, which is nice.

I think each tag can be put into a different tag that's not numeric only, i.e. [8086] --> [intel-8086]

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