I’m investigating technologies useful for the following project. I want to display a piece of text, such as an article, in the browser. I want clicking on a link to another article to display the second article on the same page, together with the first, with a line drawn from the link to the second article. I want that to be extensible into a large network which can be traversed, ideally in free-cam motion. Importantly, I want the text to be selectable.