I just had to edit out of this question, clearly discussing HTTP status code 400 Bad Request, which uses .

I thought that tags composed only of numbers could not be created. Was this is a recent change, or am I misremembering the block?

  • I've never heard of this rule myself. The only thing that comes to mind as far as numbers is only moderators can create version-specific tags or whatever that exact rule is. Although, I can't really think of any good examples where a number alone would make a good tag. So if this isn't a rule, it probably should be.
    – animuson StaffMod
    Commented Dec 27, 2012 at 1:25

1 Answer 1


I'm pretty sure you're misremembering.

Tags with numbers in them are sometimes interpreted as version tags, which has some flaws, but other than that... if the tag itself is just a number because that's the concept it refers to, that seems fine to me.

Perhaps "http-400" might be a better choice in this case, but if I were asking question, I'd probably just search for the number "400" when typing in a tag anyway.

  • 1
    FWIW, there's a fleet of html-status-code-FOO tags. Wasn't responsible for the naming, but they're not horrible. I'll take verbosity over brevity when naming things...
    – Charles
    Commented Dec 27, 2012 at 1:27
  • There's already a http-status-code-400 tag, which is the second result that comes up when you do search for "400" in the tag suggestion box (minus the new 400 tag).
    – animuson StaffMod
    Commented Dec 27, 2012 at 1:27
  • @Charles Fair enough. The point remains - number-only tags aren't explicitly disallowed. Synonyms/merges can be set up if they're misused, though.
    – Adam Lear StaffMod
    Commented Dec 27, 2012 at 1:33

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