The Conditions and Effects hierarchy contains terms for physical characteristics perceptible in or on materials, objects, or environment that are the result of particular physical circumstances or of spontaneous physical or chemical change. Relation to other hierarchies: Terms for processes of physical change are found in the Processes and Techniques hierarchy (e.g., "cracking"); if the process causes the effect, the concepts should be linked via associative relationships (e.g., the condition "cracks" 2607 caused by/requires "cracking"). Terms for forms or effects purposefully added to objects as ornament are found in the Design Elements hierarchy (e.g., "crosses étoilées") or Components hierarchy (e.g., "air traps (decorative glass components)").
