Originally Posted by theducks
All that may be hidden from eye when using certain creation tools ( don't use Indesign, so I don't know if it can show the underpinnings)
You can't see them when authoring. You have to unzip them and edit them after export. Mainly the CSS to tidy it up.
By the way.... What are "the non-purist viewer implementations that the Apples, Adobes and others, have put into the the users devices." you refer to?