What is the DOM
The DOM is a representation of a web page. It allows users to work with, manipulate, and change things on the page.
DOM Specifications
Specifications are a list of standards and definitions of all things related to the DOM. It includes infrastructure and releas information,
DOM Implementation in Browsers
The DOM Implementation interface is a representation of an object with methods that do not depnd on a particular document. I don't really understand this, but after our next lesson plan I should have a better handle on it.
Summary
All of the information that I found on MDN and alsewhere was pretty confusing. The DOM is a model of the webpage, that is not the actual page. In it a user can work with a web page and the different parts of the code (CSS, JavaScript, and HTML) work together.