alternateDescription
An alternate description for a URL or image.
Declaration
static let alternateDescription: NSAttributedString.KeyDiscussion
The value of this key is an NSString with the alternate description of the URL or image.
When a Markdown link contains a title string, the system adds this key to the link text and sets the value to the title. For example, in the Markdown tect [Visit the Apple Store](https://store.apple.com “The Apple Store website”), the system sets the value of this key to The Apple Store website.