Design Issues for Conformance Testing of the PHIGS Standard

摘要

Conformance testing for the Programmer's Hierarchical Interactive Graphics System (PHIGS) standard presents certain novel difficulties, especially the indirect effect of many functions, and the inaccessibility to the program of visual effects. The model of logical inference offers a way to organize a system of the complexity needed to overcome these problems. This complexity makes the use of certain database concepts quite valuable in allowing users to comprehend the system. The problem of inaccessible effects can be addressed only by careful design of the user interface, so as to minimize the operational difficulty and subjectivity inherent in testing such features.