DITA: Related Links
It's best to use relationship tables for links, but you can also manually add related links at the bottom of your topics. Here's a sample:
If you're using keys instead of direct links, you would write it like this:
Manually inserted related links like this are useful when you want to link out to resources on the web related to the topic.
If you're linking to content on the web, DITA can't pull in the titles automatically, so you
need to specify them through the
linktext element. You also need to add
scope="external" attributes to the link.