I wrote some text for the tag "design" which discusses some basic concepts about the design process. I was active on another stackexchange site and know that people added general knowledge and resources to the site tags back then (not sure if that has changed). I started writing to address a badge requirement and chose design since I have experience in it. After writing it I thought it would make a good answer to a question nobody has asked yet and not be appropriate for a tag. I'm not sure. However, I do think that if the tag is a wiki it might be appropriate to hold some generic knowledge, especially a bibliography and links to resources pertaining to a subject.
My understanding about that information is that it should be about the tag and it's use. Not about the word/process/item itself.
Now that doesn't mean we can't accept that here if there is enough support for it.
It was an excellent 'answer' and in all honesty you could ask a the question and post that answer to it. Making sure your question is in scope.