According to the Learning DITA website, DITA is an XML-based, tool-independent way to create, organize, and manage content. DITA is built on:
Topic-based authoring
Separating content from formatting
Minimalism
Structured authoring concepts
The Udemy course was a double-hitter for me because the tool chosen for the course, Oxygen XML, is what I’ll soon be using in my current Technical Writer role with Baxter International.