(XCode 11, Swift 5)
For clarification on this question, it appears that XCode recognizes markdown in documentation comments. If you have something like:
/// # Reference
/// [Link to Reference](https://www.google.com)
It gets recorded as:
I don’t know that this hooks into the documentation keywords in the same way that @seealso does, because the # markdown tag just refers to a header style. To demonstrate this point, you can add arbitrary sections to your documentation using the # tag:
/// # Reference
/// [Link to Reference](https://www.google.com)
/// # Section
/// This is a new section of documentation
/// # Remark
/// New remark
Gets recorded as:
