1. Content Model
   1. Meta Data
   2. Interactive Content
   3. Section Content
      1. Article
      2. aside
      3. nav
      4. section
      5. h1 -h6
   4. Heading Content
      1. H Group Element
      2. H1,
   5. Phrasing Content
      1. similar to InLine Specifications
   6. Flow Content
   7. Embedded Content
2. Block vs InLine
3. Elements
4. Tags
5. Outline Algorithm
6. Main Topic
7. Document Object Model
8. References
   1. http://www.w3.org/TR/html5/sections.html#outlines
   2. http://gsnedders.htlm5.org/outliner
   3. htttp://dev.w3.org/html5/spec-author-view/the-hgroup-element.html#the-hgroup-element
   4. Subtopic
9. Main Topic 9