Portable SDA (Sequenced Data Acquisition) with a native XML database

SDA is a general logging system for a complex process that evolved in a regular way in time. It has been used as one of the main logging facility for the Tevatron Collider during Run II. It creates a time abstraction in terms understood by everyone and allows for common time ticks across different subsystems. In this article we discuss a plan to re-implement this highly successful Fermilab system in a more general way so it can be used elsewhere. Latest technologies, namely a native XML database and AJAX, are used in the project and discussed in this article.