Chapter 1B, Technical Overview: browsers & players, declarative models vs. imperative programs
Channel: X3D for Web Authors
Date: 2016-04-10

Technical Overview 1B. Browsers and players, models versus programming, scene graphs, behaviors and events, profiles and components, document metadata, fields. Examples at http://x3dgraphics.com/examples/X3dForWebAuthors/Chapter01-TechnicalOverview