The core purpose of Wikipedia is to provide open, accessible information to the world. It's written by volunteers, who work to improve areas they're interested in. They summarize existing information from reliable sources on that topic.This, in a nutshell, is why and how you write for Wikipedia. People visit Wikipedia to get a quick, reliable overview of a topic AND to find links to more in-depth information.
It seems to me, then, that content gaps have two aspects:
- the gap between the information in the existing article and what the reader needs, and
- the gap between the information in the existing article and the information available about that topic.
The first question is about the kinds of information that is out there in the scholarly world. What kinds of information has been written about your short story? Is that information reflected in the article about your story? If not, then that is the gap.
Leave a comment to this post about a gap that you see in your Wikipedia article.