Imagine a world where the following tags exist: .

Now imagine I ask a question and in the tags list I type com interop.

Today, that results in a question tagged

But what would be cool is if it resulted in a question tagged

Another obvious application would be preventing and the like.

Does this matter? I think it does. I'm trying to solve a com interop problem today and the huge quantity of questions out there are making me mental. That is not a correct tagging. If a question is tagged both and it's because it's about COM Interop and the OP didn't know about the tag. This means that my searches are much harder than they need to be. I recall we've had a lot of retagging posses looking for tags like and , created when people tried to type entire product names including version suffixes.

If anyone can think of an X and a Y that meet these conditions:

  • X, Y, and X-Y are tags already
  • a question tagged X and Y should not be tagged X-Y
  • a person might be interested in X or Y, but never in X-Y so this retagging would cause them to miss it

Then by all means add those as an answer. It's my contention that no such combination exists

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    And what if I want to tag a question [com] [interop]? – Bart Sep 24 '12 at 18:57
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    You could type interop com for one thing, but in fact that is a terrible thing to tag a question, just as [visual-studio] and [2010] is wrong. – Kate Gregory Sep 24 '12 at 19:00
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    Well, your assumption is that they are valid tags on their own. And there could be a possibility they are valid tags under a single post. I don't think we should start making such assumptions about tag validity and I certainly don't want to have to start switching tag order just to be able to post something. – Bart Sep 24 '12 at 19:05
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