[draftkraft]

Aloha Editor uses paragraphs as first class construct. The https://github.com/alohaeditor/Aloha-Plugin-MetaView plugin gives you a nice outline view of the used dom elements to understand the semantics. Using tags for formattings like b and i seems a good choice to me as it is the suggested formatting tag for visual bold or italic presentation in HTML5. Other formattings like (indent, etc) could be implemented as css classes, but this could cause problems when copy/paste content from on site to another as the css classes may not expose the same way. This could lead to unwanted behavior because the normal users will understand the reason.