The Internet becomes increasingly available each day. Access to it in a variety of forms posts challenges to the traditional design of the Internet protocol (IP). This inspiring paper introduces the Linux kernel-based XIA. What is XIA exactly? To start with, it is short for expressive Internet architecture. The paper presents the key concepts and crucial proof-of-concept work samples from the first author’s PhD dissertation.

XIA focuses on decoupling the static structural and functional dependencies between layers or modules. These layers or modules in the current IP world are knitted together. XIA instead defines identification methods, factors, and architecture. It is built to evolve. To emphasize this point, the paper presents several case studies to help readers understand how XIA incorporates foreign designs. Eventually, the paper evaluates the XIA system’s architecture, implementation, and performance.

It is wise to view the paper as a foretaste of the age to come rather than a complete story. It is only the beginning for expressive architecture. The paper is an interesting read, yet readers will need to consult the cited references quite a bit. It will carry readers into a whole different world and new way of thinking.