A Formal Model of the Document Object Model

Achim D. Brucker 🌐 and Michael Herzberg 🌐

December 26, 2018

This is a development version of this entry. It might change over time and is not stable. Please refer to release versions for citations.

Abstract

In this AFP entry, we formalize the core of the Document Object Model (DOM). At its core, the DOM defines a tree-like data structure for representing documents in general and HTML documents in particular. It is the heart of any modern web browser. Formalizing the key concepts of the DOM is a prerequisite for the formal reasoning over client-side JavaScript programs and for the analysis of security concepts in modern web browsers. We present a formalization of the core DOM, with focus on the node-tree and the operations defined on node-trees, in Isabelle/HOL. We use the formalization to verify the functional correctness of the most important functions defined in the DOM standard. Moreover, our formalization is 1) extensible, i.e., can be extended without the need of re-proving already proven properties and 2) executable, i.e., we can generate executable code from our specification.
BSD License

Topics

Theories of Core_DOM