The Core Legion Object Model

This document describes the core Legion object model. The model specifies the composition and functionality of Legion’s core objects—those objects that cooperate to create, locate, manage, and remove objects from the Legion system. The model reflects the underlying philosophy and objectives of the Legion project. In particular, the object model facilitates a flexible extensible implementation, provides a single persistent name space, grants site autonomy to participating organizations, and scales to millions of sites and trillions of objects. Further, it offers a framework that is well suited to providing mechanisms for high performance, security, fault tolerance, and commerce. 1. This is University of Virginia Computer Science Technical Report CS-95-35. It is located on the Web at ftp://ftp.cs.virginia.edu/pub/techreports/CS-95-35.ps.Z.